Error Correction: 13:30 - The units of gyromagnetic ratio are rad/s/T (I forgot a 'per second' in my slide). Note that the 'MHz/T' unit is fine though.
I started watching this series with zero knowledge of MRI physics. A year later during my MSc, man delivers. Great timing and great delivery! The animations are topnotch and the humour makes it even more fun. 🙌🏾
This is the Best video lecture i ever watch on RU-vid. I have been waiting for this 2nd part for more than a year. Thanks so much for this amazing great job Sir 💪🙌👏
I am so glad you're making this series-- please, please, PLEASE keep it up!!! I found you thru SoME2, but my primary focus is neuro-focused biochemistry, and getting a math based explanation to how the imaging works is so wonderful!! you've made me significantly more interested in radiology from your three videos alone!
Like others I was waiting expectantly for Part II, and now .... for Part III and IV! Aside from the information, we can also admire the production. Thank you.
I feel like these are the only super in-depth and or mathematical based videos worth watching on this platform for MRI physics. What is your background or expertise in? are you a diagnostic medical physicist?
A fantastic video series that I wish to see continued! Great explanations and even greater animations that truly make a difference to understand. Most of the videos out here are hard to follow due to lacking animations. This helps immensely and I cannot thank you enough and appreciate the work you put in this. Please do continue, I cannot wait for the next parts! Also, do you - or anyone else here - has a book recommendation for MR-Physics? Looking for one that also explains different sequences like TOF, FLAIR, CEST etc. Thanks!
Thank you so much for these videos! I cannot even comprehend how much work goes into making them so I really appreciate it. As we all anxiously await the next videos, could you provide a couple of your favorite textbooks/papers/websites/whatever that you reference on this topic?
Thank you so much for coming back with Part 2! As someone with zero medical knowledge and minimal physics background I'm finding these super clear and easy to understand! I needed a clear review of NMR principles for borehole logging applications and you videos definitely deliver :) Don't think I'll live long enough to see Part 3 and 4 though... a bit jealous of people who find your videos in the future when all parts are out haha
thePIRL: "you shoul watch the first video or you migh get lost in this one" me: beeing already lost by the first part of tge first video haha just kidding, but most of the concepts are challenging to grasp
My only question is, who learns MRI technology at this level of detail? What course teaches it and who takes it? Is this simply for engineers who design this kind of equipment, or do the people who operate it or interpret the results also learn it?
33:20 This finally made the relationship between the Free Induction Decay, the spin echo and graphs I have from my NMR lab come together for me. Thank you so much for this. I've been struggling to grasp this concept for a while.
Hello. Terrific content, it's been very helpful. I'm studying to take the MRI registry in Sept 2022 and was wondering what resources you are using or planning to use for your gradients, imaging, and pulse sequences video? Just in case it is not uploaded so I can study from there...if that is alright. I greatly appreciate the work you put into your content! TY
Man, I cannot wait for Part 3 - I want to smart right now, haha! I appreciate how time consuming these videos must be to make with all the graphics and animations, and its because of the graphics and animations that make your explanation of the concepts so much more understandable than textbooks or traditional lectures - thank you!
To better understand the Spin-Echo technique in MRI, you can watch the following videos which provide visual explanations of the process: 1. [Fast Spin Echo - Spaces Animation](ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-RI-YtEBcHkc.html) - This video offers an animation that helps visualize the fast spin-echo process in MRI. 2. [How MRI Works - Part 2 - The Spin Echo](ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-M7yh0To6Wbs.html) - This video explains the spin-echo sequence, detailing the 90° and 180° RF pulses and how they work to create the MRI image. These videos will help you see how the protons in the body are manipulated by the MRI machine to produce detailed images through the spin-echo sequence.
"deliver B1 perpendicular to B0 about the which our magnetization will precess" I cannot imagine where B1 placed in . Does it mean the B1 can be placed in any place just need parallel to the transverse, right?
I don't quite understand how flip angles beyond 180° could work. If the flip angle just shows how many spins are flipped to another energy state then after 90° (equilibrium) and 180° (surplus in the antiparallell direction) how could the system then change to even higher energy states? Just larger longitudinal magnetization in the -180° direction? Also if the b1 is pointing perpendicular to b0 and M aligns 90° to that in the transverse plane, how would it then suddenly spin futher to 180°?
1. a. J/T (magnetic moment) b. Unitless 2. a. 0.02 b. 5.88e3 T c. 0.05 K *This does not look correct, I used the formula but It feel like something is missing 3. a. TB has a greater signal at TE, according to the amount of T2 weighting evaluated at that time. b. TB will still have the greater signal c. The greatest contrast would be achieved at the greater T2 of all tissues, therefore at TE = 40ms 4. TE = 7.699ms **I will do a follow-up later
I watched Part 1 and it was great. However, I am stuck at 5:24 of Part 2, when the equation S = Mw first appears (Signal = Boltzmann Magnetization times precession frequency). This seems to come out of nowhere, without a derivation from any of the previous (S) Signal equations from Part 1.
A very comprehensive approach since part I. Feeling thankful for finding the videos - I admire the effort put in them: the graphics and formulas used and explained in an understandable manner. Waiting expectantly for part III.
