MRI Scan Animation : How magnetic resonance imaging works

This animation explains how a MRI scan is obtained. It covers how the magnetic resonance signal is produced and detected in the body using powerful magnets and radiofrequency pulses. The role of key components (magnets, gradient coils, and RF coil) are linked to the processes taking place in the body. The animation explains how the MRI signal is localised in image slices of the body using gradient coils. Methods of detecting tissue contrast are introduced, though not explained in detail since the aim of this animation is to introduce the primary concepts of producing an image (proton density, transverse relaxation time, RF pulse sequences and delayed application of localisation fields).

A link to a free quiz on the content of the video is shown at 7:59. Test yourself and check you grasped the main points.

Relevant concepts: nuclear magnetic resonance imaging, protons, precession, Larmor frequency, magnetic field strength, relaxation, phase, transverse and longitudinal vectors, e.m.f., induction and Fourier transformations.

Essential learning for A-Level physics, and medical physics courses at university.
OCR physics A, AQA A-Level physics, Edexcel A-Levrl physics

[PhysicsHQ]

A link to a free quiz on the content of the video is shown at 7:59. Test yourself and check you grasped the main points.

[RESISTAGE]

this one is the best explanation of how it works not what it does.
thank you.

[ahmedelgabry]

man how can such amazing and detailed animation go unseen like this this video is so underrated

[karsangtamang]

Best channel ever visited... For 3 d animation and visualizations of concepts

[yelectric]

I wish I could learn all about these physics and the wisdom in their application. Damn

[thisuserisdead]

I've been binge watching your videos and I have to say that I am very fond of the visuals to show the topic you are explaining. You gained a new subscriber, plus much love from a physics student

[GranPaMark]

I just got one and I wanted to better understand the machinery. I am a student of physics, so your explanation was spot on for me. Thank you so much !

[MsPringlz]

After watching the video I took the quiz and got 13/20 and I know nothing about Physics. The video was detailed and informative.

[alexsmith]

This blew my mind! Thanks so much, I really get the way it all works now.

[olivianewtonjohn]

well was that detailed explanation so difficult to convey? Thank you for the best MRI video I have seen. What nearly a dozen videos together couldn't explain, you managed to do in one single video. Execellent to me, thanks again.

[MrHaluza]

great explanation and the music surprisingly fits very well, kudos for the quiz as well!!

[felely]

music choice made me giggle but thank you for the informative comprehensive video!!

[edwardhughes]

Blimey thats complicated. Whoever invented that is quite clever.

[kayk]

I thought the gradient coils were located inside the MRI machine in solenoid form not to the side as shown in the video?

[qiufheq]

Very good and informative explanation. I think I understood the first half. However, I found a typo, at 1:15, precession is around magnetic field lines, not gravitational field, right?

[Heritage]

Is MRI based on getting things going and then turning things off? So if you turn one thing off you can get signal from proton precession going from IN phase to OUT of phase, but if you turn this other thing off you can get signal from the relaxation of the change in angular momentum of the precession itself, independent of phase. Is that what this is all about? And which one is T1 and which one is T2 again?

[mohammadtalebi]

it was Great! how can we see the quiz results?

[likequwei]

May I have questions:
1. Are the ranges of values of Bx and By same or very different?
(If very different, 16 frequencies can be made at same time. <- I geuss)
2. For 4x4 matrix, are 16 RF pulses applied by order? or mixes of 16 frequencies applied at same time.
Thank you.

[ericpham]

I thought inside a magnetic flux field, the small spin would turn field line into the sine wave or triple and a high resolution of MaD( magnetic anormality detection would synchronized to the tiny triple wave of each region and display as needed at any resolution. UN cosmetic operation, they super imposed the 3 d desired feature over region need fix and make any one look as young and beautiful or energetic with add on energizer driver

[davidmaddison]

Spoiled by shocking music. Can you do another one with a better soundtrack?