How MRI Works - Part 1 - NMR Basics

How MRI Works: Part 1 - NMR Basics.
First in a series on how MRI works. This video deals with NMR basis such as spin, precession, T1 and T2, TR and TE, and Boltzmann Magnetization.

Slides can be purchased here:

0:00 - Introduction
1:22 - Nuclear Magnetic Resonance
4:10 - Inside the MRI Scanner
7:50 - The Proton, Spin, and Precession
11:34 - Signal Detection and the Larmor Equation
14:10 - Flip Angle
15:30 - Ensemble Magnetic Moment
16:34 - Free Induction Decay and T2
18:43 - T2 Weighting and TE
21:46 - Spin Density Imaging
24:18 - T1 Relaxation
25:45 - T1 Weighting and TR
27:01 - The NMR Experiment and Rotating Frame
28:57 - Excitation: the B1 field
30:14 - Measuring Longitudinal Magnetization
31:34 - The MR Contrast Equation
34:42 - Boltzmann Magnetization and Polarization
40:09 - Hyperpolarization
41:42 - Outro

[msgreymatter]

Beginning, me thinking "Ooooh, 43 minutes, isn't that a bit long?". 3 hours later: still at minute 12, as I keep rewatching with normal and 1.5x speed to make sure, I get it all. GREAT explanation. My textbook has led me down, but you're getting me right back on track again :)))

[ScottWalshWoodworking]

This is outrageously good content. The visuals are so well done and so important for a good understanding.

[DKonigsbach]

Several have commented here that this is the best explanation of MRI they've encountered. I'll go further. This is perhaps the best physics lecture I've heard. And given how many excellent physics videos are here on YouTube, that's saying a lot.

[ololhxx]

i am no medical professional, nor am i a physician ... and yet, i managed to follow the basic explanations and now know the abstract concept about how MRIs work. That is cool.

[LBoogie]

As an MRI Tech, I truly appreciated the ease and level of understanding that this video was placed. It’s not the easiest to explain in layman’s terms of course, but this was awesome. I’m always looking for a different way to review and improve on my skill set and I enjoyed this!

[Liz-yeqi]

Even though the lecture is long, you didn’t just upload a lengthy lecture of monotone “I know I’ve repeated this multiple times but hear me out” kind of voice, but you actually take your time to explain and make the environment fun and active. Thank you!

[natalieadolphi]

I'm an MR physicist, and I'm very picky about getting the physics correct, and this video is very good! Kudos!

[VoidHalo]

Before even watching this video I'm going to say the fact that it's over 40 minutes long is VERY promising. It tells me the author(s) didn't cut any corners or dumb anything down for the sake of appealing to typical YouTubers. That shows some real integrity, and I respect the heck out of such integrity. I can't stand it when a video claims to explain an incredibly complex subject that requires a layperson have some background knowledge in a lot of fields in 5 minutes.

[joaosaraiva]

I need the second part, I have an exam this week 😭😭😭😭😭
you can't abandon us like this

[spectra]

Great Video, Thank you!
I’m waiting for part II.

[FraizyMD]

Hands down the greatest MRI physics lecture I've seen so far... Keep up the good work! I'm avidly waiting for part II! - Rads Resident

[headpox]

35:56 "Stay with me. Don't get lost just yet."
I love it..! I was already mostly lost, but had to keep watching... Such incredible content. Beautifully delivered.

[kiuhwcj]

The lecture literally saves my life! The explanation is so straightforward and easy to follow. Will recommend it to my mates. Cheers!

[rhzme]

Amazing and incredibly simple (but at the same time very deep) explanation of the MRI/NMR technology. I'm very glad to find this video, while preparing to neuroimaging technology exam. It's a bit long but certainly worth to watch. Waintin' for more — thank you!

[roflawlmao]

Thank you so much for this lecture. Probably the highest quality, clearest I've heard without oversimplifications.

[michealjones]

SO GOOD! So many areas of foggy confusion cleared up for me. Everybody always wants a hand-waving non-descriptive explanation which just kills my need to understand every little detail. I cant thank you enough for this video.

[sina]

Wow! So good! I am no physicist or mathematician, but even hearing it once and being exposed to it was very helpful conceptually. Thank you, and I can’t wait for part two!

[stephenparallox]

Great video, you really touch on the physicals portions of MRI better than any other video I have come across.

[g.aloysie]

ohh my God, thank you very much, i spent two weeks trying to understand this chapter but one video made it all clear

[msmarji]

Best explanation and graphics for MR on YT. Looking forward to part 2. Thank you so much for all your time and effort in creating this video.