Introducing MRI: Inversion Recovery (35 of 56) 

Sir, Greetings from India. I am an Otorhinolaryngologist from Kolkata, India who happens to have an extra interest in Radiology. Ever since the lockdown started here, which was from 23rd March, I have been reading up a lot on the radiology of the Temporal Bone and CP Angle. I was desperately looking for some educational material, either in the form of a text book or a video series to understand the Physics behind MR Imaging and happened to chance upon this series. This was God send for me. For the last two days, I have binge watched the series, finishing this lecture a few moments ago and plan to finish the entire series in the next two-three days. ALL I CAN SAY IS THAT YOU ARE A MASTER TEACHER AND THOUGH I MAY NOT COMPREHEND EVERYTHING AT ONE GO (AND MAY HAVE TO REVISIT THE SERIES AGAIN), I HAVE LEARNT A LOT FROM YOU IN THE LAST TWO DAYS THAN WHAT I COULD HAVE, HAD I JUST FOLLOWED TEXTBOOKS AND PUBLICATIONS. Till now I kept reading about the use of 3D FLAIR, especially the heavily T2-weighted 3D FLAIR (both pre and post Gadolinium) in Ménière's Disease, but after this lecture, I have started to comprehend the logic behind its use. Thank you ever so much, Blessed Sir!! Regards, Dr Manoj Agarwal

Thank god for Michael Lipton. Saving the day with his very thought out MRI lessons once again.

Brilliant. Thank you.

Fantastic. Thanks

This was an incredible lecture! thank you for clarifying the IR techniques. my classroom professor did not clearly explain this concept.

Thanks!! very helpful. keep up this content!

Just excellent information.....thank you

Thank you

This is very informative. Thanks a lot!

In T2 FLAIR Imaging: Could you, instead of waiting for a long TR of 10 seconds or more, use a shorter TR and decrease the flip angle?

thanks a lot. actually i am searching for that point how the reversed magnetization is going to come back with out creating 90degree transverse magnitization. Now i got the answer. thanks for such great lecture

So you are essentially choosing a Ti to suppress the grey matter in MP-RAGE?

As mentioned on the video, Inversion Time of CSF (long) is around 2seconds. May I know the Inversion Time for Fat (Short) used on STIR?

What book do you use?

Even when the Longitudinal magnetization is at zero and we give the 90 RF pulse wouldn't all the protons just get in phase and thus give a signal in the transverse plane anyway?? In a normal T1 the moment you give a RF pulse the longitudinal vector immediately goes to zero and all the protons phase causing a transverse plane signal. Here the only difference is the longitudinal is already at 0 but why wouldn't they get in phase and cause a transverse signal??

I think when you started talking about T1w FLAIR and T2w FLAIR, you should have pointed that TR is not related to 90degree pulse like the standard pulse sequence

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