Spin Echo MRI Pulse Sequences, Multiecho, Multislice and Fast Spin Echo | MRI Physics Course #15
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- Опубликовано: 30 июн 2024
- High yield radiology physics past paper questions with video answers
Perfect for testing yourself prior to your radiology physics exam 👇
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This is the first of a three part series discussing the broad categories of MRI pulse sequences. We start to day by looking at spin echo sequences before moving on to gradient echo and inversion recovery sequences.
Here we will discuss how a spin echo is created. Then we will review multiecho, multislice and fast echo sequences.
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Not sure if the question banks are for you?
If you're here, you're likely studying for a radiology physics exam. I've spent the last few months collating past papers from multiple different countries selecting the most commonly asked questions. You'll be surprised how often questions repeat themselves!
The types of questions asked in FRCR, RANZCR AIT, ARRT, FC Rad Diag (SA), ABR qualifying Core Physics and MICR part 1 are surprisingly similar and the key concepts remain the same throughout. I've taken the most high-yield questions and answered them in video format so that I can take you through why certain answers are correct and others are not.
Happy studying,
Michael
#radiology #radres #FOAMrad #FOAMed
Thank you. Hope you know how much stress you are relieving with your work.
🤯 I’m not quite sure what to say. Completely gobsmacked. Thank you. This is so generous. You’ve been so supportive of the channel and I truly am grateful.
Hi @Nittaku2000 I’m worried there might be something wrong on your end. The super thanks has gone through four times. If this was not intended please contact RUclips asap!
Thank you for the heads up
Thank you. These are amazing lectures. You have wonderful gift in lecturing!
Thank you!
Michael, I am preparing for FRCR Part 1 exam and I can't thank you enough for your extremely clear and easy to understand explanations for all the series you have made. The visuals have made the concepts even easier to grasp. Keep up the good work and I just wanted to say that I am very grateful for all the wonderful lectures you have made for us!
Ah, thank you. This has made my evening. So glad these videos have been helpful ☺️
can you please explain why the area of the negative lobe of slice selection gradient and that of the frequency encoding gradient are half the area of the positive lobe?@@radiologytutorials
Really incredible videos! Even after taking official courses in MRI at the University, this has had huge educational benefit for me. Thanks so much for sharing!!!!
Great video!! it helped me a lot to understand the sequences and to see the differences in a really easy way!
Great work tbh, very elaborative and simple. Thanks for the effort
These videos are simply amazing! Thank you so much 😊
Thank you. I really appreciate it 😊
I really learn alot in simplified version from you sir, thank you very much 🤝🙏🙏
I’m so glad! There’s definitely a line in MRI that is difficult to draw when it comes to knowing what depth to know the concepts. Hoping I’ve explained things at a level that is easy to understand without being too superficial🤷🏻♂️ thanks for watching!
wow, just now I got it. thank you very much!
These lectures are unbelievably helpful. You have a true gift. Cannot thank you enough for taking the time to share it with us!!!
That's so kind 🥰 so glad you're enjoying them
Amazing, clear and concise.
Thank you!
Great job man! Step by step, I'm going to watch all your videos. You are putting a lot of energy into it. Keep doing in that way 👌
Greetings from Serbia 🇷🇸
Thank you mate! Greeting from South Africa!
최고의 강의ㅜㅜ
Amazing 🎉🎉
you are an excelletn teacher. Greetings from Colombia
Thank you! 😃Greetings from South Africa
Sir micheal please please please make CT scan lectures too, its a request...and thankyou so much for such amazing lecture guidance in such elaborative way... too much effort u hv put into this which is obvious, n its such a great help.. things i couldnt understand from books u made them sooo easy for us... thankuuu
Thank you. Yes, CT will come but need to finish MRI first 😣
Thankyou sir, prayers for you!
Question: Do you mean the signal by T2* for that signal loss due Inhomogeneties or you mean the regaining till TE? 11:39 : "signal what we've done here is accounted for those local magnetic field in homogeneities and the loss of signal at this time period is generally only due to spin spin interactions or molecules that have moved within the tissue during this period of time and have experienced a slightly different magnetic field strength"
Thanks a lot sir Michael 🎉
Pleasure Fazal 🤝🏻
Amazing work! Looking forward to future videos. I wonder if you could sprinkle in a few practical estimates/limits when you're covering these concepts. For example, what's the fastest rate we can sample the signal given current scanners? What gradients are MR scanners capable of generating? What's a ballpark TR/TE/TA for different types of sequences?
... Also, I think it would be super helpful, once you've done your main video series of course, to go through some sample protocol pdfs and show how they are organized, what choices were made for the sequences, and comment on why those choices might have been made.
These are all great suggestions. I'm thinking of sitting down with an experienced MRI tech after this series and diving deep in to the practicalities of MRI scanning (ie. how we can apply these physics principles). Plan to cover machine settings, parameter selection and patient factors. Would this be something you'd find helpful?\
@@radiologytutorials Yes! Any practical information is more rare to find in public videos.
The legend is back!
Haha, thanks mate!
Great❤❤
Thank you sir
Many Thanks Bro... I really Get benifits from your lectures and participated in your Q bank as well . I will mentioned you if I pass my FRCR physics exam in next Sept. 😁🎉🎉🎉
Thank you for all your support mate. I look forward to you message in September 🤝🏻
Have u booked already? Booking for next year september exam will start in october right???
Hi, are you going to introduce magnetic susceptibility in your lectures? If not, can you please recommend anything to be able to relate the susceptibility factor into what you are teaching in MRI. It would be of great help thank you.
Thankyou sir
what would you reccomend to study when studying for the ARRT for MRI?
can you please explain why the area of the negative lobe of slice selection gradient and that of the frequency encoding gradient are half the area of the positive lobe?
Thankyou 🎉🎉
You’re welcome 😊
Thankyou sir❤❤
Cheers Sohail ❤️
great job...keep it up!!! how many MRI lectures left? anxiously waiting for CT lectures 😀😀
Thanks! Still a few more to go, but getting there 🙌
Wow🎉🎉
Hi! I have a doubt, the opposite gradient that we apply before the FEG to bring the H atoms in phase at TE is only applied during the gradient echo sequence or also during the spin echo sequence? In the spin echo sequence is the 180 pulse enough to rephrase the spins at TE or we also need to apply the opposite gradient before the frequency encoding gradient?
Hi. Great question. The dephasing frequency gradient is also applied in spin echo sequences. Often in the same direction as the FEG because it’s generally before the 180 RF pulse 🙂
FRCR at the door 😢
waiting the next beautiful lectures before the exams😊
Good luck with the exam! Wish I could get more out sooner. I'm sure you will do great. Please let me know how it goes!
please upload the remaining lectures of MRI. my physics paper is in mid september
I'm trying to😅 I am making them from scratch as I go. There's no bank of lectures that I'm releasing slowly. Hope the ones so far have helped!
Hi there something I'm am a bit confused about. Would anyone be able to explain to me why 180 pulse dose not rephase the spins to the point that the phase encoding gradients effect is removed?
Great work tbh, very elaborative and simple. Thanks for the effort
Thankyou sir
Thanks lot sir
Most welcome 🙂
Great work tbh, very elaborative and simple. Thanks for the effort
You're welcome! Thank you!
Thankyou sir
Thankyou sir
Thankyou sir
Thankyou sir
Thankyou sir
Thanks for watching 🙂