I hope this video was helpful! Listen to the sounds of an MRI scan filmed inside the scan room here: ruclips.net/video/TIsrOtSSUQY/видео.html Why Is Metal Not Allowed In MRI Scan Rooms? Click here to watch: ruclips.net/video/ug3e9W5H0jI/видео.html What Is MRI and How Does It Work?: ruclips.net/video/19qu6SYqOTc/видео.html
Sorry, maybe that explanation would work for scientists and electrical engineers; but for us common lowlife slobs with other Masters degrees, that did not make any sense at all. Any way you can make a video without using technical jargon? Also, animation showing movement of internal parts as they make those sounds would be most helpful. Don't slow the sounds. We've all had to have MRIs at one point or another, so the sounds are very familiar. I've always wondered what makes the different sounds, and unfortunately after your video, I STILL DO!!!
@@Jared7873 It's actually the windings in the gradient tube (gradient coils) that moving/trying to move. The gradient tube is constructed of fiberglass and epoxy. Hundreds of amps of electrical current pulse through the coils at audio frequencies. Something's got to give. In this case, massive amounts of audio frequency "noise" is generated. The gradient coils are water cooled, so that may give you an idea of how much power is used by the system while scanning. Not to mention the radio frequency amplifier, which is part of the system.
nah programmers try to come up with something that was engineered without the use of some form of computer or just anything engineered that doesn’t include some form of computer in the design
The CT scan fascinates me to no end. It's like a quicker version of the MRI for emergency situations; both times they saved me when I had an obstructed bowl and pulmonary embolism two separate times. Just wish the dye they inject via IV fluids didn't gave me the odd sensation of wanting to go to the bathroom. They told me it was a known side affect, but I hate new and weird feelings I didn't prepare for fully.
@@Echo81Rumple83I had a crazy reaction to the contrast fluid. They told me it wouldn't be uncomfortable but I felt like I almost passed out and had a crazy sensation over my whole body and tunnel vision.
I've had 3 in my life, and every time i walk in and hear the coldhead pumping im like "damn, that's a sick beat!" Humor gets me through basically everything tbh
Guys every time you get an MRI please make sure your ear protection is put on right, if you're mid-scan and you realize the sound is getting too loud( it is) stop the scan, and put them on right. Don't feel pressured by the technician or the machine, stop the scan, they should give you an emergency button to hold onto... press it! I was to scared to stop the machine and it only got louder and louder, my right ear was rigging and i got temporary damage, do not be afraid to stop the scan.
I was given the option to listen to music through one of those cheap over-the-ears foam headsets. I declined the music. Wasn't offered hearing protection. Permanent damage. Wish I had known how loud it would be
I've never had a problem with the ear plugs, but I did feel like I was going to throw up when the contrast started. I was seriously considering hitting the button.
Three time cancer survivor here, had my first MRI in mid 1999, I can still remember the look on the techs faces as they were reading my live scan. I’m so thankful they are quicker now. Longest MRI I’d had was six hours. That six hours is down to a half hour these days.
It depends on the strength of primary field. I had a head scan in 0.3T open scanner and while it was loud, I did easily it without hearing protection (it was available for patients). It didn't deafen me afterwards, even temporarily.
It's almost 2am and I can't sleep because I'm too fascinated with learning about MRI machines. I dunno how to feel about that but thank you for providing the info nonetheless lol
00:55 Note: sublimation refers to a solid transforming directly into a gas, skipping the liquid phase, for example dry ice. A liquid transforming into a gas, such as helium in this instance, is referred to as boiling or evaporation (if this phase transformation occurs at a temperature below the boiling point, as we commonly see when a little water splashes on the countertop next to your sink). Great explanation of the racket produced by an MRI.
@@Danielle_Renee1121 I suffer from EDS and hyperacusis and I unfortunately have to get MRIS on a reg it’s horrible for me even with double ear protection 😢
@@Ang417Liquid helium only exists within the magnet housing, it is never pumped. Helium gas is used as a refrigerant by the coldhead. It cools the shields within the housing and reduces liquid helium boiloff. The coldhead cannot turn helium gas into liquid, it just cools the housing, usually in at least 2 stages. Toshiba systems are much quieter due to the fact that the gradient coils are in a vacuum.
@@johntyler4222 And because Toshiba coils are in a vacuum, they cannot be cooled as well from what I understand. (vacuum is an insulator) Therefore, scan times are longer as a result because the coil cannot be driven as hard. Also, cold heads DO recondense the helium gas boil off back into a liquid. I've had magnets go for years w/o the need for a helium refill, provided the cold head is replaced in a timely manner as it wears and cooling water supplies are not interrupted frequently.
The first brain MRI I had, in 2008, was completely closed; it was like being in a space capsule. I had no idea what to expect. I'd describe that noise as the Pile Driver from hell.
Absolutely agreed with my GP's description of having a brain MRI: "Like being buried in a coffin on a building site." As someone with high anxiety which causes claustrophobia, I could only get two thirds of the way through, even with Valium on board. I don't think I could ever do it again, unless it was a much more open tube.
First time I was in one, for about 30 seconds, the electrically? operated bed couldn't get me out as I was jammed in the tube. Due to claustrophobia they had to put me to sleep for the actual scan and30 years later I still remember waking up half way through it. Not a pleasant experience for me but I remember the banging.
They can be scary at first but you get used to them. My first one I was really frightened at all the noise, but by the time I had a 5th one earlier this year I actually fell asleep in it lol
Yeah, I also have had these enough times that I kept falling asleep during one for my shoulder. They had to start over several times. I felt bad but I was just too sleepy to stay awake.
Just today had my mri scan, the noices were crazy but looking back kinda cool and super loud!! But i got to watch a movie and we just got a call that my brain is healty and yheres no tumours (just migraine) so im happy! The banging and beeping inside the machine were kinda scary tho 😂
@@Lorre982 You're paying for it one way or the other. The techs and doctors don't work for free. The MRI systems aren't cheap. Operational costs of an MRI system are huge. It has to be paid for one way or another. Through taxes and/or higher retail costs, you're paying for it one way or another.
I won't call you crazy for that reason but that naked sky diving at midnight has got to stop. It would be okay if you weren't doing it above the Catholic girls school but c'mon . . . 😉
I had my first MRI many years ago when they were quite novel. As a farm boy I immediately recognized the sound as being a New Holland hay baler. Of course I also appreciated the idea of adaptive reuse of existing tech. Several years later I had another, and realized they had upgraded to a newer machine from John Deere. Of course tech progresses. My latest, just a couple of years ago, sounded like they had left the farm altogether and moved on to something that probably came from an automated brake drum grinding machine.
Today was my 3rd after a looong time. Now I know that "breathing" sound comes from the coldhead. It definitely helped me with keeping my own breathing even. :) I felt so safe in the machine, and I loved its sounds. Be it sick or not, lol. I hope there is a 'full version' to listen to here on yt. (I'm not high or anything)
Being an electronics nerd since high school and having now had 6-7 MRI's, I've always wondered what these noises were. Thanks for a perfect explanation! Of course, I'm also a little surprised that I've likely been passing through up to 30Kw of RF energy! That's sobering given many local radio stations broadcast well below that range.
your description doesn't do it justice. it's incredibly loud and sounds like being inside some alien reactor or something. i had my hand scanned for 20 minutes . it was very painful as they put my hand in a clamp that caused me great pain in the exact area that i was having the scan for. the noise was incredible. each scan lasted a few minutes and every one had a different sound. my earphones slipped off one ear because of the position i was in and i couldn't get them back on.
I recall having my first and only MRI scan sometime in the early1990's in Pennsylvania. I recall the bang, bang, bang noise while the scan was ongoing but don't recall it being very loud with hearing protection on. I assume the MRI magnetic field power has increased since then.
What i find most fascinating about MRI's is that they dont pull themselved apart. I mean they produce eddycurrents strong enough to fling a chair through the room, yet the delicate electronics inside stay unharmed. I mean I'm certain they dont use non-magnetic wires and such, so that it doesnt literally eat itself is miraculous to me
Because of major surgery I had several years ago I need check ups every other year that requires an MRI scan. On every occasion I’m always amazed at this magnificent machine.
I had my 3rd one in s matter of weeks today due to knee injuries. The sounds are awfully loud for me as I have hyperacusis. However, the patterns etc. In the sound are interesting, and they reminded me of when my undiagnosed pernicious anemia caused me to develop psychosis in which I thought aliens were communicating with me via morse code. 😅😂 The morse code and other sounds I heard was due to B12 deficiency causing de-myelination of nerves in the ears etcm which leads to tinnitus. I still have it today, though less extreme.
In 2018 I had a couple of MRIs done. The rhythmic pulsations and buzzes and the general warming sensation (RF heating?) were pretty much soothing, to the point I was falling asleep. The technician told me to keep myself awake so that jerking in my sleep wouldn’t degrade the image. You might correctly guess that I’m an engineer. I work with RF and superconducting electronic circuits ;o)
During MRI, you have to stay still and not breath deeply. The more I tried not to laugh, the more I was about to ROFL. All the noises of the scanner reminded of ship engine room machinery. Diesel generator, starting air compressor, etc...
Are there different cooling techniques for the cold head? I had an MRI recently and I didn't hear a number of these sounds, whereas I did with one I had ages ago.
Some manufacturers enclose the gradient coils in a vacuum chamber, which greatly reduces the noise they create during a scan. But this comes at a price as the coils can't be cooled as easily. Gradient coils are liquid cooled due to the immense amount of heat they generate during a scan. Old, old MRI magnets, and I mean OLD now, used a separate jacket of liquid nitrogen to insulate the helium vessel to reduce the amount of helium boil off. This necessitated a weekly fill of nitrogen to replenish it. The helium liquid would usually need to be filled approx every 3 weeks. This was in the days before the cold head technology came along. Naturally, those old magnets would not exhibit the pumping noise of a cold head because there wasn't one. Magnets with cold heads theoretically never need to be refilled as the helium boil off was constantly recycled back into the cryo vessel. HUGE amounts of cooling water is needed though to keep the cyro compressor happy otherwise it overheats and shuts down. When that happens helium boil off rates go through the roof. And that stuff ain't cheap.
I love MRI scanner. Can’t explain that but as soon as I hear their sounds, I feel connected with them. Specially with the breathing sound of the coldhead. I love laying inside a MRI scanner. It feels so cozy. I can totally relax there. Actually more than in my bed. That all is so very strange 🤔🤔🫣
@@marlenemalcolm9659 😃😃🤝🤝🤩👍So very cool!! I love you for this. You made my day. Love to know there are people out there who behave like me. 😃 It makes me feel close to you.
I'm thankful for the technology I just wish somebody would have mentioned the intense noise that you have to get through for 45 minutes. If you are someone that is sensory sensitive please let them know ahead of time
Used to handle MRI's no problem but now, in my 70's can barely stand it. Feel like the filling in a canoli. Don't mind the noise. Interesting presentation. Thanks
Is it normal to be able to feel it when the scans moves across you? I always have a weird feeling like slight internal vibrations moving through the area thats being scanned. I get 1 or 2 scans a year
When I had my first MRI, the sounds would have made for a nice and groovy industrial/techno beat. I was vibing in there and almost disappointed when it was over. 😅
Great video! Except the information regarding the RF coil, which is wrong. RF coils doesn’t make sounds at all in the scanner. Their frequency are in the MHz range, way above the human audible frequencies. So the gradient coil is the one that produces loud sounds, in the rage of kHz (human audible sounds)
Some people are afraid of MRIs. Here's how I think of it (and maybe this can help some others?) Every six months, I get to: -Lay in a cold room for 45-60 mins -Lay in this awesome tube that makes awesome noises -I get to wear a warm blanket and wear those awesome grippy socks And my personal experience as a pediatric patient: -I get to watch a movie with these awesome goggles -When I get contrast, they have numbing cream, so I don't even feel the needle! Honestly, this all sounds pretty awesome, yeah?
@@HajiabdulGaffar-o6n Pittsburgh, PA. Of course, the last few items are because of my status as a pediatric patient, so it might not be the same as someone who is an adult.
@@Radoslaw731 There are several options that help with it. Some doctors will prescribe valium to alleviate the stress before the procedure. Some healthcare systems provide the option of a sedated MRI. I know that in some places, there's even an option to do an upright MRI, though I don't know how well it works.
I've had one recently and it was incredibly quiet, compared to what I remember from many years ago. It was so relaxing, I almost fell asleep during those 40 minutes. There was a distinct part of the scan that drew my attention though, when the entire machine started shaking around twice a second. It sounded like a really big element in the machine is moving around rapidly back and forth or something. Any idea what that is?
It’d be a lot more zen if I wasn’t being told to hold my breath over and over again. Last MRI I had was about 1.5 hours in the bore. Every itch comes out to torture you, arm is always sitting funny and starts to hurt, need to piss etc but thru it all I’m still as a mummy because I want the best possible result.
As for the shaking, prob a specific pattern of drive to the gradient coils. You’ve got 1-3 Tesla (1000-3000 gauss) electro magnet with these gradient field coils they drive that basically wobble the magnetic field of the electromagnet to make the hydrogen nuclei in the cells of your body spin this way or that and it takes a tremendous amount of current. The coils are well bonded to the housing but the forces are tremendous so they move around. The force is proportional to the magnitude of the current, the dimensions of the loop, and the intensity of the field.
literally just had an MRI scan done about 3 hours ago and it was exactly the same for me as what you described. Except that I was lying on my front so it wasn't that relaxing. But it was mostly quiet (relatively) except for a section at around the middle of the scan when it made very loud clicking / banging sounds, and it also started shaking and vibrating. Pretty interesting nonetheless
Had one this morning and it was just like being at work. Sleeping in a bunk in my truck with a 2 stroke diesal refrigerator running 3 feet from my head. I felt right at home 😂
Thank you. That was a really good, to the point explanatory video. I was lucky, I liked the noise in the MRI and it helped distract me from my claustrophobia.
The one I had on my lower back wasn't as loud as I was told it would be but I wish I could have had a choice of music on the phones, 20 minutes of rap music arrrgh! Helpful explanation. Thanks
If you're a worried first-timer, here are some tips. It's my experience for brain MRIs. DON'T BE AFRAID, it's not that bad. If you are very nervous you can show up 30 minuted earlier and ask for something to calm down (in swiss hospitals). For me the worst part of getting my brain scan is the dye injection. Once I'm in, I do a mini-meditation: name 3 things your body feels (like your socks touching your feet, whatever is under your fingers,...), 4 things I hear, 5 things I can see. That's 5-10 minutes gone. Then another few minutes appreciating the fact that you get to be lazy and HAVE to do absolutely nothing and it's completely justified! Boom, I'm half way there. Then, rinse and repeat. Or plan my MRI reward. It's usually a good pastry and coffee. Pizza maybe? Anything, really. Got plenty of time to figure it out. Making lists also helps. Top 10s for example. Until finally the tech announces the dye injection, which means there's only 10 minutes left! You can do this! ❤✌️🖖
. _ABSOLUTELY_ ONE OF THE _TOP_ EDUCATIONAL VIDEOS _EVER_ SUGGESTED TO ME BY THE YT 'ALGORITHM'!!! I'VE WONDERED FOR MAYBE 40 _YEARS_ WHY THE HELL THESE THINGS ARE SOOO DAMN NOISY!!! _THANX_ _FOLKS!!!_ 🙂 🙂 🙂 🙂
In 1975 I started college and was taking chemistry 101. I was given a tour of the facility and the guide took us to a small room that had a copier sized, non-descript machine in it - not much to look at. The machine was making a rythmic knocking sound and he told us it was their new Nuclear Magnetic Resonance spectrometer. Nuclear Magnetic Resonance is the basis for all MRI devices. The concept of using NMR to make images had been conceived and experimented with in 1971 by Paul Lauterbur, but it took many years before MRI machines became available.
Same! I had my mri scan today because i suffer from severe migraines. I had the scan to make sure i dont have tumours in my brain. Before the scan, i took medicine so my migraine kinda went away for a while. After the scan it was back and i didn't know why. Glad to hear it happened to others too, so im not the only one😂❤
Thanks for the video; now I know what I heard....before I fell asleep in a running MRI during a scan. When the radiologist called on the intercom to check on me (I was ill at the time), I didn't answer! Two more calls on the 'comm later and I startled awake, not realizing I had fallen asleep during the scan. The rad tech was a little concerned, but I told him I hadn't heard his first calls on the 'comm. When we finished, he pulled me out of the MRI and said he never had someone fall asleep during a scan.
My mom just got an MRI done a few days ago. I could hear the noises all the way out in a separate room I was waiting in. I could only imagine how loud it was for her even with the earplugs.
I had one some years ago. One of the most stress inducing procedures I bad. At the time I was coughing regularly. Knowing I could sit up or turn if I coughed made it worse.
I began working in MRI with the first commercially made unit. It was a TechniCare 0.15T. back then they were called NMRI. The "N" stood for nuclear. Later on I did liquid cryogen transfers for helium and nitrogen before there were cold head technology.
I've only been scanned once, and I'd let people practice on me all the time if I could. I love the sound and how loud it is. It's like you're isolated from the rest of the world, inside a spaceship or something. I was so relaxed I almost fell asleep.
I have had several MRI scans in my lifetime. My sincere advise is close your eyes to avoid claustrophobic reaction, and you will do find. They should tell everyone this!!!
Thanks for explainig . Can you / anyone else do something about the noises? Did you mention the loud train-horn like torture device that goes on intermittently. What heck is that, some sort of warning ? Is it not possible to make magentic coils that work at liquid nitrogen temperature, so that one does not have to worry about condensing the gas.
I'm kinda surprised I managed to sleep through my MRI scan. I had a messed up sleep schedule where I went to sleep at around 6-7AM and woke up midday. The scan was at 9AM. That day I just didn't go to sleep at all, and after the whole sleepless night managed to fall asleep 3 times during the 51 minutes long scan. To me it felt like barely 5 minutes passed lmao. I do still remember those noises though, so it must have ingrained itself in my memory quite vividly.
another question- is there different type of gradient coils? I know they all have XYZ but I have heard of saddle/ horse shoe shaped coils when asking about scanners to my hospital.
The gradient coils in an open MRI has a saddle/horseshoe configuration to accommodate a larger aperture. But i believe they may have been talking about the GE HNS (Head, neck, shoulder) Coil horseshoe accessory. It is shaped like a horseshoe and the patients head sits in the center of the horseshoe. The HNS coil acts like an antenna to improve return signal and helps to increase SNR. It can get confusing with so many components named coil eg. RF coil, gradient coil, brain coil, knee coil, etc. but they are all aptly named as these components contain large loops of copper wiring to help improve local signal. I hope this was helpful. Thank you for the great question!
I’ve had several mri of my head. The best way to describe it is, even with the headphones on, it’s like having someone operate a jackhammer in your brain.
All correct and well explained, but the RF field does not cause any noise, at least not audible noise, since the operating frequency of the RF pulses are well outside of the audible frequency band.
Trying to understand the use of the word Sublimation in the video related to helium involved with the MRI scanner. Trying to understand what this means because Sublimation means going from a gas to a solid and skipping the liquid phase I guess. Why is the Sublimation term used near the beginning of the video? I only see gas being converted to a liquid to achieve the cooling benefit
That is correct! Thank you for pointing out that oversight. Using boil-off, or expansion instead of sublimation would have been accurate. I try to keep all information as accurate possible, so I really appreciate it. I will make a note of it in the description. Thanks again!
@@MRIPETCTSupportEngineer I'm looking forward to an MRI and MRA of my neck and skull relating to ear ringing. Toward determining if the ear ringing I experience is due to pulsatile tinnitus. Even if it is pulsatile it's still something that likely will not be meaningfully treatable but worth learning more about and who knows what else scans will come up with. This is what led me to your video. Thank you for a really great video
I've had several MRI scans. It sounds like being close to a running large diesel engine. The first one I had, the technicians were still being trained so the scans were rather lengthy. I fell asleep during one of them and moved when I woke up so it had to be redone. I was in the machine for almost an hour. The last scan I had was for a shoulder problem and lasted under 10 minutes.
I'd like to learn more about why and what the pounding, thumping, repetitive pile driver-y sounds are. I liked but didn't really understand your quick survey description of how/why some sounds.
I went through MRI twice during 2 different years, although it's scary n the process takes almost 30 minutes plus,It felt like ages,i was made comfortable by the operators.😊
I had a head scan for tinnitus it was the most frightening thing I have ever done. The banging noise a claustrophobia were unbelievable. Nobody told me what would happen but the ear plugs were ominous.
I have been head first in couple of these and always wondered why the trance party. Not saing that it is wrong, just wondering why. It is impressive that in 3 minutes and 34 seconds I got answers to all the questions that made me wonder!
I actually had an brain scan that was scanned in Siemens magnetom avanto 1.5 t ngl it was so intense but after i saw this vid i realized i got instant relief
I hope this video was helpful! Listen to the sounds of an MRI scan filmed inside the scan room here: ruclips.net/video/TIsrOtSSUQY/видео.html
Why Is Metal Not Allowed In MRI Scan Rooms? Click here to watch: ruclips.net/video/ug3e9W5H0jI/видео.html
What Is MRI and How Does It Work?: ruclips.net/video/19qu6SYqOTc/видео.html
3:07 Why aren't the fiberglass mountings designed so the gradient coils don't knock against them?
Sorry, maybe that explanation would work for scientists and electrical engineers; but for us common lowlife slobs with other Masters degrees, that did not make any sense at all. Any way you can make a video without using technical jargon? Also, animation showing movement of internal parts as they make those sounds would be most helpful. Don't slow the sounds. We've all had to have MRIs at one point or another, so the sounds are very familiar. I've always wondered what makes the different sounds, and unfortunately after your video, I STILL DO!!!
I could fall asleep listening to that video of the sounds inside an MRI.
@@Jared7873 It's actually the windings in the gradient tube (gradient coils) that moving/trying to move. The gradient tube is constructed of fiberglass and epoxy. Hundreds of amps of electrical current pulse through the coils at audio frequencies. Something's got to give. In this case, massive amounts of audio frequency "noise" is generated. The gradient coils are water cooled, so that may give you an idea of how much power is used by the system while scanning. Not to mention the radio frequency amplifier, which is part of the system.
Well I don't want to get one
Respect great engineers that life wouldn't be possible without them.
*a better quality of…
@@randygreen007 sometimes it legitimately saves lives though...I suspect
How did you get to engineering first?
Physicists enter before engineers in this. Watch 'Big bang theory' always 😂😂
nah programmers try to come up with something that was engineered without the use of some form of computer or just anything engineered that doesn’t include some form of computer in the design
The best thing about MRI, CT and such imaging scanners is that almost no person must now hear the dreaded phrase "exploratory surgery."
The CT scan fascinates me to no end. It's like a quicker version of the MRI for emergency situations; both times they saved me when I had an obstructed bowl and pulmonary embolism two separate times.
Just wish the dye they inject via IV fluids didn't gave me the odd sensation of wanting to go to the bathroom. They told me it was a known side affect, but I hate new and weird feelings I didn't prepare for fully.
@@Echo81Rumple83 Yeah that feeling is wild...
I another one just to experience it again🤣
@@Echo81Rumple83I had a crazy reaction to the contrast fluid. They told me it wouldn't be uncomfortable but I felt like I almost passed out and had a crazy sensation over my whole body and tunnel vision.
Or the other dreaded phrase may one hear from a doctor “we think”
As an OR nurse, this is unfortunately not true. We would need a lot better imaging for that to be the case.
I've had 3 in my life, and every time i walk in and hear the coldhead pumping im like "damn, that's a sick beat!"
Humor gets me through basically everything tbh
and I thought i was the only one who thought it was a rock band.
Just had one this morning and honestly I spent the 15 mins vibing and mixing the coldhead sound in my head 🤣
Yeah I close my eyes and start thinking of good trance choons....soon passes by.
Same, I always think it sounds like a Daft Punk B track haha!
I tried to get one done on Tues and 6 months ago ..no deal. Why is the noise so loud
Guys every time you get an MRI please make sure your ear protection is put on right, if you're mid-scan and you realize the sound is getting too loud( it is) stop the scan, and put them on right. Don't feel pressured by the technician or the machine, stop the scan, they should give you an emergency button to hold onto... press it! I was to scared to stop the machine and it only got louder and louder, my right ear was rigging and i got temporary damage, do not be afraid to stop the scan.
I wish I’d known that, my useles plug fell out. And they forgot the music having asked what I’d like to distract me…
I had an MRI and they never offered any hearing protection. And my insurance company decided to deny the MRI charge. I'll never go inside one again.
I was given the option to listen to music through one of those cheap over-the-ears foam headsets. I declined the music. Wasn't offered hearing protection. Permanent damage. Wish I had known how loud it would be
I've never had a problem with the ear plugs, but I did feel like I was going to throw up when the contrast started. I was seriously considering hitting the button.
Had 2 done.ok but loud ask for advanced mri
Three time cancer survivor here, had my first MRI in mid 1999, I can still remember the look on the techs faces as they were reading my live scan. I’m so thankful they are quicker now. Longest MRI I’d had was six hours. That six hours is down to a half hour these days.
Having been in a MRI in 2015, I can say that, even with the proper hearing protection on, these things are loud.
Of course, because how much hearing protection you have on while going through it doesn't affect how much sound output they have.
I used non-ferric headphones and cranked up the music.
I had my my brain scanned (yes, presence of brain confirmed😇) about the same year. They said it would be loud but it turned out to not be bothersome.
It depends on the strength of primary field.
I had a head scan in 0.3T open scanner and while it was loud, I did easily it without hearing protection (it was available for patients).
It didn't deafen me afterwards, even temporarily.
@@ajdziaj Important point. All scans are not the same.
It's almost 2am and I can't sleep because I'm too fascinated with learning about MRI machines. I dunno how to feel about that but thank you for providing the info nonetheless lol
Hyperfixation vibes
@@peshisparkles1582 m o o d
lol same. 2:15 am here
Lol
Yep, that's why I'm here too
I’ve had a couple MRI scans and fell asleep in the scanner. Thank you for the explanation.
Same, although it's ridiculously loud, the sound has a kind of hypnotic droning quality
00:55 Note: sublimation refers to a solid transforming directly into a gas, skipping the liquid phase, for example dry ice. A liquid transforming into a gas, such as helium in this instance, is referred to as boiling or evaporation (if this phase transformation occurs at a temperature below the boiling point, as we commonly see when a little water splashes on the countertop next to your sink). Great explanation of the racket produced by an MRI.
here for this! I love the noises it makes, I am that rare one that is obsessed with it lmao
I have Multiple Sclerosis and have to get them a couple of time a year. I am the same way! I find the noises to be relaxing.
@@Danielle_Renee1121 I suffer from EDS and hyperacusis and I unfortunately have to get MRIS on a reg it’s horrible for me even with double ear protection 😢
I love the sounds too I actually feel so relaxed when I’m getting one
i have fallen asleep in every mri i've had done. that rhythmic pulsing is just so soothing haha
Respect for great engineers..who have built this MRI machine..
The idea for the MRI, like cell phones, came from the Star Trek TV program back in the 1960s.
And the other MRI machines across the globe?
this is not true, the idea for MRIs came from quantum mechanics, the concept of nuclear magnetic resonance is what's used in MRIs
Just had one today and was surprised by the pumping sounds, had no idea it was pumping liquid helium 🤯
Me too
I had one today too. The brain in my case. The sound at 3:13 was sooo load and sounded very strange in my head.
Same - I had one today and here I am to figure out what all the noises were!
@@Ang417Liquid helium only exists within the magnet housing, it is never pumped. Helium gas is used as a refrigerant by the coldhead. It cools the shields within the housing and reduces liquid helium boiloff. The coldhead cannot turn helium gas into liquid, it just cools the housing, usually in at least 2 stages. Toshiba systems are much quieter due to the fact that the gradient coils are in a vacuum.
@@johntyler4222 And because Toshiba coils are in a vacuum, they cannot be cooled as well from what I understand. (vacuum is an insulator) Therefore, scan times are longer as a result because the coil cannot be driven as hard. Also, cold heads DO recondense the helium gas boil off back into a liquid. I've had magnets go for years w/o the need for a helium refill, provided the cold head is replaced in a timely manner as it wears and cooling water supplies are not interrupted frequently.
The first brain MRI I had, in 2008, was completely closed; it was like being in a space capsule. I had no idea what to expect. I'd describe that noise as the Pile Driver from hell.
Absolutely agreed with my GP's description of having a brain MRI:
"Like being buried in a coffin on a building site."
As someone with high anxiety which causes claustrophobia, I could only get two thirds of the way through, even with Valium on board. I don't think I could ever do it again, unless it was a much more open tube.
I've always fallen asleep in MRIs. The sounds aren't uncomfortably loud, really. They're rhythmic and hypnotic. Nothing to be afraid of.
I was a about to have a panic attack. I didnt realize i was claustrophobic
First time I was in one, for about 30 seconds, the electrically? operated bed couldn't get me out as I was jammed in the tube.
Due to claustrophobia they had to put me to sleep for the actual scan and30 years later I still remember waking up half way through it.
Not a pleasant experience for me but I remember the banging.
I always thought of it as a heavy metal rock band.
They can be scary at first but you get used to them. My first one I was really frightened at all the noise, but by the time I had a 5th one earlier this year I actually fell asleep in it lol
for anyone who is scared of them i'd say think of it as listening to a rock band.
Yeah, I also have had these enough times that I kept falling asleep during one for my shoulder. They had to start over several times. I felt bad but I was just too sleepy to stay awake.
Me too...Slept like a baby 😂
For medical reasons I have to go into one of these things yearly. You have answered a 20 years old question... Thanks!
Just today had my mri scan, the noices were crazy but looking back kinda cool and super loud!! But i got to watch a movie and we just got a call that my brain is healty and yheres no tumours (just migraine) so im happy! The banging and beeping inside the machine were kinda scary tho 😂
This really helped me calm down before my mri. Thanks
It's the sound of a large pump pulling money out of your bank account to pay the bill when done.
I have genetic desease , to keep monotorized and under controll i take 1 mri each two years for free (yes i live in EU).
That’s cause you’re living in a sick country
Had my free one this morning, full spine and pelvis (U.K)
@@Lorre982 You're paying for it one way or the other. The techs and doctors don't work for free. The MRI systems aren't cheap. Operational costs of an MRI system are huge. It has to be paid for one way or another. Through taxes and/or higher retail costs, you're paying for it one way or another.
@@NESigTaxes baby it's all about those taxes
It just gives me chills just hearing the sounds
I'm glad I'm only watching this after the amazing MRI experience 💀45 minutes is hell trust me
MRI is truly a speedcore/extratone/splittercore/flashcore generator. amazing technology.
Call me crazy, but the sound experience of an MRI is so soothing.
I won't call you crazy for that reason but that naked sky diving at midnight has got to stop. It would be okay if you weren't doing it above the Catholic girls school but c'mon . . . 😉
You're not alone... I actually find it therapeutic.
@@jassenjj had my first one today and i fell asleep. I was snoring and had dreams that someone was knocking on my door. 🤣
🎉 yes
Crazy
I had my first MRI many years ago when they were quite novel. As a farm boy I immediately recognized the sound as being a New Holland hay baler. Of course I also appreciated the idea of adaptive reuse of existing tech. Several years later I had another, and realized they had upgraded to a newer machine from John Deere. Of course tech progresses. My latest, just a couple of years ago, sounded like they had left the farm altogether and moved on to something that probably came from an automated brake drum grinding machine.
As a MRI feeder, I also raised some of the newest model. All of them are grownup by now.
I love the sounds of an mri. With the blindfold on, the noise and me relaxing i feel like im traveling though some worm hole in space. 😂
I remember absolutely JAMMING to the sounds when I first walked in to the mri room
Today was my 3rd after a looong time. Now I know that "breathing" sound comes from the coldhead. It definitely helped me with keeping my own breathing even. :) I felt so safe in the machine, and I loved its sounds. Be it sick or not, lol.
I hope there is a 'full version' to listen to here on yt. (I'm not high or anything)
You are not alone. Being inside an MRI machine was one of the best experiences of my life
Being an electronics nerd since high school and having now had 6-7 MRI's, I've always wondered what these noises were. Thanks for a perfect explanation! Of course, I'm also a little surprised that I've likely been passing through up to 30Kw of RF energy! That's sobering given many local radio stations broadcast well below that range.
When I had my MRI scan I almost fell asleep because those noises make me very calm 😂
I didn't mind it all that much, either.
your description doesn't do it justice. it's incredibly loud and sounds like being inside some alien reactor or something. i had my hand scanned for 20 minutes . it was very painful as they put my hand in a clamp that caused me great pain in the exact area that i was having the scan for. the noise was incredible. each scan lasted a few minutes and every one had a different sound. my earphones slipped off one ear because of the position i was in and i couldn't get them back on.
I recall having my first and only MRI scan sometime in the early1990's in Pennsylvania. I recall the bang, bang, bang noise while the scan was ongoing but don't recall it being very loud with hearing protection on. I assume the MRI magnetic field power has increased since then.
You explained it very clearly and informatively. Thank you for this video. 👍👍
What i find most fascinating about MRI's is that they dont pull themselved apart. I mean they produce eddycurrents strong enough to fling a chair through the room, yet the delicate electronics inside stay unharmed. I mean I'm certain they dont use non-magnetic wires and such, so that it doesnt literally eat itself is miraculous to me
Because of major surgery I had several years ago I need check ups every other year that requires an MRI scan. On every occasion I’m always amazed at this magnificent machine.
They’re pretty cool, even though I hate being in them, they are really cool piece of technology!
Thanks for adding actual captions for the Deaf
More videos to need to do that every once in a while, I’ll go into my own channel and clean up captions
I actually enjoy having mri scans and the sound. I find it meditative and can find patterns in the sounds. For me it’s decorative noise.
I had my 3rd one in s matter of weeks today due to knee injuries. The sounds are awfully loud for me as I have hyperacusis. However, the patterns etc. In the sound are interesting, and they reminded me of when my undiagnosed pernicious anemia caused me to develop psychosis in which I thought aliens were communicating with me via morse code. 😅😂 The morse code and other sounds I heard was due to B12 deficiency causing de-myelination of nerves in the ears etcm which leads to tinnitus. I still have it today, though less extreme.
In 2018 I had a couple of MRIs done. The rhythmic pulsations and buzzes and the general warming sensation (RF heating?) were pretty much soothing, to the point I was falling asleep. The technician told me to keep myself awake so that jerking in my sleep wouldn’t degrade the image.
You might correctly guess that I’m an engineer. I work with RF and superconducting electronic circuits ;o)
During MRI, you have to stay still and not breath deeply. The more I tried not to laugh, the more I was about to ROFL. All the noises of the scanner reminded of ship engine room machinery. Diesel generator, starting air compressor, etc...
thanks for uploading this ! really informative
Glad it was helpful!
I had one today and I meant to watch this yesterday. Per tech I needed it. Thank you for the information.
I came to this video to hear what spunds will i jear inside MR and how loud will they be. Great explanation. I just wish there were more actual sounds
I like to imagine that i'm inside a techno concert with all those sounds going off around me :)
The lovely techs at "my" hospital have installed color LED lights in the MRI room 🎉 it's no Prodigy but I appreciate the gesture.
Exactly my thoughts.
Thank you for the explanation, I have come across these noises many times because of my job repairing MRI boards, which are very annoying.
I am getting an MRI tomorrow and I was curious, thanks!
Are there different cooling techniques for the cold head? I had an MRI recently and I didn't hear a number of these sounds, whereas I did with one I had ages ago.
Depends on the machine and what kind of scan you got.
Some manufacturers enclose the gradient coils in a vacuum chamber, which greatly reduces the noise they create during a scan. But this comes at a price as the coils can't be cooled as easily. Gradient coils are liquid cooled due to the immense amount of heat they generate during a scan. Old, old MRI magnets, and I mean OLD now, used a separate jacket of liquid nitrogen to insulate the helium vessel to reduce the amount of helium boil off. This necessitated a weekly fill of nitrogen to replenish it. The helium liquid would usually need to be filled approx every 3 weeks. This was in the days before the cold head technology came along. Naturally, those old magnets would not exhibit the pumping noise of a cold head because there wasn't one. Magnets with cold heads theoretically never need to be refilled as the helium boil off was constantly recycled back into the cryo vessel. HUGE amounts of cooling water is needed though to keep the cyro compressor happy otherwise it overheats and shuts down. When that happens helium boil off rates go through the roof. And that stuff ain't cheap.
So different amounts of electricity flowing through the coils makes different noises? This vid was so interesting
I love MRI scanner. Can’t explain that but as soon as I hear their sounds, I feel connected with them. Specially with the breathing sound of the coldhead.
I love laying inside a MRI scanner. It feels so cozy. I can totally relax there. Actually more than in my bed.
That all is so very strange 🤔🤔🫣
No it's not. Can get some good sleep in there. I've done it, more than once.
@@marlenemalcolm9659 😃😃🤝🤝🤩👍So very cool!! I love you for this. You made my day. Love to know there are people out there who behave like me. 😃 It makes me feel close to you.
@@marlenemalcolm9659 Having an MRI in 3 weeks again. Looking forward for a good relaxation 😁
Danke für die Erklärung.
I'm thankful for the technology I just wish somebody would have mentioned the intense noise that you have to get through for 45 minutes. If you are someone that is sensory sensitive please let them know ahead of time
Excellent! Thanks for this information!
Used to handle MRI's no problem but now, in my 70's can barely stand it. Feel like the filling in a canoli. Don't mind the noise. Interesting presentation. Thanks
Is it normal to be able to feel it when the scans moves across you? I always have a weird feeling like slight internal vibrations moving through the area thats being scanned. I get 1 or 2 scans a year
I dunno you shoud ask the techs i;ve never had that feeling but have you ever had your hair stand on end when being in an electric field?
No never had that problem
@@sheilaolfieway1885
Not to scare u or anything but id assume u would know iron is in ur blood and iron is a metal😂😂 mris are magnetic
When I had my first MRI, the sounds would have made for a nice and groovy industrial/techno beat. I was vibing in there and almost disappointed when it was over. 😅
Yes! I wish they'd give us a little beat machine to play with.
Great video! Except the information regarding the RF coil, which is wrong. RF coils doesn’t make sounds at all in the scanner. Their frequency are in the MHz range, way above the human audible frequencies. So the gradient coil is the one that produces loud sounds, in the rage of kHz (human audible sounds)
Some people are afraid of MRIs. Here's how I think of it (and maybe this can help some others?)
Every six months, I get to:
-Lay in a cold room for 45-60 mins
-Lay in this awesome tube that makes awesome noises
-I get to wear a warm blanket and wear those awesome grippy socks
And my personal experience as a pediatric patient:
-I get to watch a movie with these awesome goggles
-When I get contrast, they have numbing cream, so I don't even feel the needle!
Honestly, this all sounds pretty awesome, yeah?
In which city you did ur mri
@@HajiabdulGaffar-o6n Pittsburgh, PA. Of course, the last few items are because of my status as a pediatric patient, so it might not be the same as someone who is an adult.
A claustrophobic can't use a MRI
@@Radoslaw731 There are several options that help with it. Some doctors will prescribe valium to alleviate the stress before the procedure. Some healthcare systems provide the option of a sedated MRI. I know that in some places, there's even an option to do an upright MRI, though I don't know how well it works.
@@Radoslaw731 There are open room MRIs for people who are claustrophobic.
I've had one recently and it was incredibly quiet, compared to what I remember from many years ago. It was so relaxing, I almost fell asleep during those 40 minutes. There was a distinct part of the scan that drew my attention though, when the entire machine started shaking around twice a second. It sounded like a really big element in the machine is moving around rapidly back and forth or something. Any idea what that is?
It’d be a lot more zen if I wasn’t being told to hold my breath over and over again. Last MRI I had was about 1.5 hours in the bore. Every itch comes out to torture you, arm is always sitting funny and starts to hurt, need to piss etc but thru it all I’m still as a mummy because I want the best possible result.
As for the shaking, prob a specific pattern of drive to the gradient coils. You’ve got 1-3 Tesla (1000-3000 gauss) electro magnet with these gradient field coils they drive that basically wobble the magnetic field of the electromagnet to make the hydrogen nuclei in the cells of your body spin this way or that and it takes a tremendous amount of current. The coils are well bonded to the housing but the forces are tremendous so they move around. The force is proportional to the magnitude of the current, the dimensions of the loop, and the intensity of the field.
literally just had an MRI scan done about 3 hours ago and it was exactly the same for me as what you described. Except that I was lying on my front so it wasn't that relaxing. But it was mostly quiet (relatively) except for a section at around the middle of the scan when it made very loud clicking / banging sounds, and it also started shaking and vibrating. Pretty interesting nonetheless
Had one this morning and it was just like being at work. Sleeping in a bunk in my truck with a 2 stroke diesal refrigerator running 3 feet from my head. I felt right at home 😂
Thank you. That was a really good, to the point explanatory video.
I was lucky, I liked the noise in the MRI and it helped distract me from my claustrophobia.
The one I had on my lower back wasn't as loud as I was told it would be but I wish I could have had a choice of music on the phones, 20 minutes of rap music arrrgh! Helpful explanation. Thanks
Interesting. Thanks for sharing!
I get yearly scans. Its a great time for me to listen to music and to get a nap taken!
I love these sounds. It is like first class dubstep.
If you're a worried first-timer, here are some tips. It's my experience for brain MRIs. DON'T BE AFRAID, it's not that bad. If you are very nervous you can show up 30 minuted earlier and ask for something to calm down (in swiss hospitals). For me the worst part of getting my brain scan is the dye injection. Once I'm in, I do a mini-meditation: name 3 things your body feels (like your socks touching your feet, whatever is under your fingers,...), 4 things I hear, 5 things I can see. That's 5-10 minutes gone. Then another few minutes appreciating the fact that you get to be lazy and HAVE to do absolutely nothing and it's completely justified!
Boom, I'm half way there.
Then, rinse and repeat. Or plan my MRI reward. It's usually a good pastry and coffee. Pizza maybe? Anything, really. Got plenty of time to figure it out.
Making lists also helps. Top 10s for example. Until finally the tech announces the dye injection, which means there's only 10 minutes left!
You can do this! ❤✌️🖖
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_ABSOLUTELY_ ONE OF THE _TOP_ EDUCATIONAL VIDEOS _EVER_ SUGGESTED TO ME BY THE YT 'ALGORITHM'!!! I'VE WONDERED FOR MAYBE 40 _YEARS_ WHY THE HELL THESE THINGS ARE SOOO DAMN NOISY!!! _THANX_ _FOLKS!!!_ 🙂 🙂 🙂 🙂
In 1975 I started college and was taking chemistry 101. I was given a tour of the facility and the guide took us to a small room that had a copier sized, non-descript machine in it - not much to look at. The machine was making a rythmic knocking sound and he told us it was their new Nuclear Magnetic Resonance spectrometer. Nuclear Magnetic Resonance is the basis for all MRI devices. The concept of using NMR to make images had been conceived and experimented with in 1971 by Paul Lauterbur, but it took many years before MRI machines became available.
MRIs aren’t scary to me anymore but I always leave with a headache 😂
Same! I had my mri scan today because i suffer from severe migraines. I had the scan to make sure i dont have tumours in my brain. Before the scan, i took medicine so my migraine kinda went away for a while. After the scan it was back and i didn't know why. Glad to hear it happened to others too, so im not the only one😂❤
My head was hurting to lol I just did my scan
Thanks for the video; now I know what I heard....before I fell asleep in a running MRI during a scan. When the radiologist called on the intercom to check on me (I was ill at the time), I didn't answer! Two more calls on the 'comm later and I startled awake, not realizing I had fallen asleep during the scan. The rad tech was a little concerned, but I told him I hadn't heard his first calls on the 'comm. When we finished, he pulled me out of the MRI and said he never had someone fall asleep during a scan.
My mom just got an MRI done a few days ago. I could hear the noises all the way out in a separate room I was waiting in. I could only imagine how loud it was for her even with the earplugs.
I delivery these along with other imaging systems for a living to hospitals and clinics, CT, X-RAY, AMX & Mammo units along with MRI. Neat stuff.
I had one some years ago. One of the most stress inducing procedures I bad. At the time I was coughing regularly. Knowing I could sit up or turn if I coughed made it worse.
Great video
I began working in MRI with the first commercially made unit. It was a TechniCare 0.15T. back then they were called NMRI. The "N" stood for nuclear.
Later on I did liquid cryogen transfers for helium and nitrogen before there were cold head technology.
I've been in an MRI early this year, and yes, it feels like you're piloting a fucking evangelion with how loud the thing is.
It was horrible claustrophobic being in that thing for half an hour
They have open MRI. It looks like 2 hamburger buns. It is open all the way around. A hint get a wash clothes over your eyes.
I went in one to day and i fell asleep in one lol
Thanks for your sharing
just had one this morning.. hopin im able to get a simple AC joint repair surgery. like, the triple endo button procedure, would be great.
I've only been scanned once, and I'd let people practice on me all the time if I could. I love the sound and how loud it is. It's like you're isolated from the rest of the world, inside a spaceship or something. I was so relaxed I almost fell asleep.
I have had several MRI scans in my lifetime. My sincere advise is close your eyes to avoid claustrophobic reaction, and you will do find. They should tell everyone this!!!
I also found closing my eyes helped with the claustrophobia.
to say an MRI is "loud" is an understatement lol
I found the MRI noises quite relaxing and one time i fell asleep in an MRI ! I would love to have an MRI at home just to relax in it.
Thanks for explainig . Can you / anyone else do something about the noises? Did you mention the loud train-horn like torture device that goes on intermittently. What heck is that, some sort of warning ? Is it not possible to make magentic coils that work at liquid nitrogen temperature, so that one does not have to worry about condensing the gas.
I'm kinda surprised I managed to sleep through my MRI scan.
I had a messed up sleep schedule where I went to sleep at around 6-7AM and woke up midday. The scan was at 9AM.
That day I just didn't go to sleep at all, and after the whole sleepless night managed to fall asleep 3 times during the 51 minutes long scan. To me it felt like barely 5 minutes passed lmao.
I do still remember those noises though, so it must have ingrained itself in my memory quite vividly.
Hearing the chirping sound of an mri just makes me happy
As a fan of the electronic musician Ryoji Ikeda, I found my MR scan to be surprisingly enjoyable. It was similar to a being at performance.
another question- is there different type of gradient coils? I know they all have XYZ but I have heard of saddle/ horse shoe shaped coils when asking about scanners to my hospital.
The gradient coils in an open MRI has a saddle/horseshoe configuration to accommodate a larger aperture. But i believe they may have been talking about the GE HNS (Head, neck, shoulder) Coil horseshoe accessory. It is shaped like a horseshoe and the patients head sits in the center of the horseshoe. The HNS coil acts like an antenna to improve return signal and helps to increase SNR. It can get confusing with so many components named coil eg. RF coil, gradient coil, brain coil, knee coil, etc. but they are all aptly named as these components contain large loops of copper wiring to help improve local signal. I hope this was helpful. Thank you for the great question!
I’ve had several mri of my head. The best way to describe it is, even with the headphones on, it’s like having someone operate a jackhammer in your brain.
I think they are funny sounding. It's hard for me not to laugh at all that racket! Thanks for the informative, entertaining video!
All correct and well explained, but the RF field does not cause any noise, at least not audible noise, since the operating frequency of the RF pulses are well outside of the audible frequency band.
That just made me more scared of MRI machines...I never knew that.😱
Trying to understand the use of the word Sublimation in the video related to helium involved with the MRI scanner. Trying to understand what this means because Sublimation means going from a gas to a solid and skipping the liquid phase I guess. Why is the Sublimation term used near the beginning of the video? I only see gas being converted to a liquid to achieve the cooling benefit
That is correct! Thank you for pointing out that oversight. Using boil-off, or expansion instead of sublimation would have been accurate. I try to keep all information as accurate possible, so I really appreciate it. I will make a note of it in the description. Thanks again!
@@MRIPETCTSupportEngineer I'm looking forward to an MRI and MRA of my neck and skull relating to ear ringing. Toward determining if the ear ringing I experience is due to pulsatile tinnitus. Even if it is pulsatile it's still something that likely will not be meaningfully treatable but worth learning more about and who knows what else scans will come up with. This is what led me to your video. Thank you for a really great video
I got a mri scan when I was in middle school and it’s kind of cool that is why now I am taking imaging of medicine course in university.
I've had several MRI scans. It sounds like being close to a running large diesel engine. The first one I had, the technicians were still being trained so the scans were rather lengthy. I fell asleep during one of them and moved when I woke up so it had to be redone. I was in the machine for almost an hour. The last scan I had was for a shoulder problem and lasted under 10 minutes.
I'd like to learn more about why and what the pounding, thumping, repetitive pile driver-y sounds are. I liked but didn't really understand your quick survey description of how/why some sounds.
Unfortunately getting into magnetic fields and RF stuff gets really complicated really quickly.
I’d still watch though
I went through MRI twice during 2 different years, although it's scary n the process takes almost 30 minutes plus,It felt like ages,i was made comfortable by the operators.😊
When you get a chance can you film the Victoria Cummins imaging area MRI AC please??
Clear as mud.
I had a head scan for tinnitus it was the most frightening thing I have ever done. The banging noise a claustrophobia were unbelievable. Nobody told me what would happen but the ear plugs were ominous.
I have been head first in couple of these and always wondered why the trance party. Not saing that it is wrong, just wondering why. It is impressive that in 3 minutes and 34 seconds I got answers to all the questions that made me wonder!
MRI is a good PROTOTYPE. When are they going to make the final product?
I actually had an brain scan that was scanned in Siemens magnetom avanto 1.5 t ngl it was so intense but after i saw this vid i realized i got instant relief