High Velocity Signal Loss (HVSL), Time of Flight Effect and Turbulence | MRI Physics Course #23

MRI physics question bank is now live!
High yield radiology physics past paper questions with video answers
Perfect for testing yourself prior to your radiology physics exam 👇
➡️ X-RAY, ULTRASOUND AND MRI BUNDLE (SAVE over 25%): www.radiologyt...
➡️ X-RAY QUESTION BANK: www.radiologyt...
➡️ ULTRASOUND QUESTION BANK: www.radiologyt...
➡️ MRI QUESTION BANK: www.radiologyt...
=========================
I have also created two RADIOPAEDIA LEARNING PATHWAYS
bit.ly/radiopa... (👈 25% OFF DISCOUNT LINK)
WHAT’S INCLUDED?
✅This RUclips series Ad free
✅Constantly updated Radiopaedia articles
✅Summary slides
✅Key take home bullet points throughout
✅Multiple review quizzes
✅Short answer review questions
✅Official Radiopaedia course completion certificate
25% discount using this link: bit.ly/radiopa...
=========================
This is the first in a series of talks reviewing signal in vessels. As you'll see signal varies greatly with the type of sequence used and sequence parameters.
Today we review high velocity signal loss (HVSL). This is often referred to as 'flow voids'. Flow voids represent signal loss due to high velocity blood flow exhibiting time of flight effects (ie. blood leaves the slice before the 180 degree RF pulse is applied). The term flow void represents a patent vessel with normal flow, not a lack of flow.
After HVSL, we briefly discuss the concept of turbulence and how this leads to signal loss/ hypointensity.
=========================
SIGN UP TO MY MONTHLY EMAIL NEWSLETTER 👉 bit.ly/3ruLh3d
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

[@fazaltahir4216]

Sir Michael, ur efforts are highly appreciated 🎉

[@awfulwarlock91]

Michael, I have enjoyed all your videos and bought the Question Bank thing.
I can tell I am learning because I am coming to the conclusion or payoff when you talk about new subjects because the foundation you laid in earlier talks build upon each other in such a logical way.

[@deutschkurdischesFleisch95]

i watching all the videos from you and i am glad i found it - thanks for that and your effort !

[@SushmaChaurasiya-l3t]

Please give subtitles it gets easy to understand the subject reading n revising it

[@rachlruby]

Thank you Michael! Is it right to say we can’t see slow flow and turbulent flow effects on SWI, because it’s a gradient echo sequence and is thus resistant to TOF effects?

[@ManakSuriya]

Thankyou sir❤❤

[@anisazrou4157]

thank you doctor

[@SunadriyaSaboon]

Thanks sir🎉🎉

[@GajabSingh-v8g]

Thanks sir

[@SanfranciscoSunder]

Thankyou 🎉🎉

[@AlizaKohri]

Thanks sir🎉

[@ayaansingh1249]

Sir i request u to make video on digital subtraction angiography, fluoroscopy also, lv from india❤

[@fazaltahir4216]

Both these topics are difficult, we need some explanation. Even MRS needs explanation,,,

[@EllieRad2023]

Amazing

[@hameedaklan]

Excellent

[@radiologytutorials]

Thank you so much 😀