MRI basics: part 5 : Determining Location

In my final part of a 5 part series on MRI, I discuss how the MRI machine uses gradient coils to determine the location of precessing hydrogen atoms. I also do a brief review of all 5 parts
SEE THE FULL LESSON ON MRI - www.physicshigh.com/mri.html
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[@latifmalik2980]

Simply awesome!! No simpler way to explain it.

[@PhysicsHigh]

Thanks!

[@danielshaw4796]

Hi Paul, I've recently started a new job as an MRI radiographer and these videos have really helped me understand the physics behind what I'm doing. Thank for making a complex subject so accessible.

[@Jkawalsky1]

I know this is high school physics, but I am a medical student and enjoyed these videos thoroughly. Obviously, I still have many questions, but the videos provided a very strong basis. Thank you!

[@emmabarclay3305]

Fantastic series of videos, thank you!

[@mikhailreshetnikov3236]

Thank you a lot, these 5 videos really helped me to get started with MRI!

[@yugi1st]

amazing stuff, clear as hell thks!

[@sardonyxmanikumarpalaparth9627]

thank you. you made me understand the concept easily.

[@gerransalto6242]

These video were SUPER helpful.Thank you!

[@nirmanisamarathunga446]

These videos are really helpful. Well organized, simple, and very informative. Thank you

[@rummanmuhammad927]

great job McGyver..u r the best..

[@jacobvandijk6525]

A very fine basis for further study. Thanks!

[@SlobberySlob]

I thought there is no way you would explain MRI in 5 videos, but this is superb. Always confused about spin lattice decay and t1, t2....no longer thanks to this! The clearest explaination I have come across. The only criticism is that localisation is not fully explained. I think it should be a little more in depth as it was THE critical step in taking mri from being a chemistry tool to a medical tool in the 1980s. Whats missing is mentioning k space and ff transforms to obtain the image from the localisation and how gradient coils determine then xyz of the voxel.

[@mellisj123]

well explained from beginning to end of the series thank you !

[@abdulahmadi4512]

LOVE it. THANK YOU

[@caitieb1609]

thank you so much! i knew that i was intuitely missing somehting about the localization.

[@oussamamasri5515]

very helpful indeed

[@kyrank.4321]

Thank you so much, I missed a lecture at university (3rd year psych major ;D) and would totally stress out if not for you.

[@d4351239]

Very good and explicit explanation thank you

[@Jormit]

Wow this is Genius!

[@BillSchutt-ji4se]

I enjoyed the video. You gave the formula of flouro-glucose as C6H12FO5. In fact the formula is C6H11FO5. The F replaces an OH.

[@eduardosoccer7]

Thank you

[@prajwalaryan2208]

Hello sir , from your video I found that gradients are superimposed with main magnetic field in order to find the location of the slice but I want to know the physics behind it , please let me know sir Thanks

[@metroman111283]

Thank you so much. Your explanations were amazing !!!

[@PhysicsHigh]

Thanks.

[@PhyPsyFilm]

I watched all five of your videos on MRI and I must say you calmed my nerve when I now know what exactly will happen to my body tomorrow aha~ Thank you!

[@PhysicsHigh]

Thanks. Glad they helped and good luck.

[@scottgloverjohnson]

I love these diagnostic imaging series you have! Inherently interesting physics aside, what inspired you to include medical imaging in your videos? I will definitely be suggesting these videos as supplements to OJT for techs. I hope you continue the series and maybe a include a bit on image formation, or artifacts?

[@PhysicsHigh]

In the state I live, the curriculum has a elective section that includes Medical Physics, which covers the basics of ultrasound, X-ray, PET and MRI.

[@mamtasisara6684]

Amazing.....thnk you so much 😊

[@PhysicsHigh]

Most welcome 😊

[@suhailsalim7328]

Sir if you don't mind can you please tell what is the reason for selecting frequency encoding along the long axis and phase encoding along the short axis of the image

[@blueties1]

Great series of videos! Why are there initially more parallel than antiparallel? Why does this ratio increase with increasing magnetic field strength?

[@sincerelyamel7669]

Thank you so much for create this video, it help me a lot in medical physics,,,keep going

[@PhysicsHigh]

thanks - glad it helped

[@fatmaharman3842]

excellent

[@braaitongs]

Excellent series! Please can explain Dynamic Nuclear Orientation. C.D. Jeffries wrote a book of the same name in 1963. I am sure it is related to this.

[@0kiruku]

Thanks for making it clear and simple. Simply enjoyed listening to all the parts of MRI basics. Keep the good work going. One of the best explanations on mri. Sir can u tell me what kind of software u used to explain if it is ok. It would be useful to use to explain in class. Thanks a lot.

[@PhysicsHigh]

I use Inspire by Promethean. Use QuickTime for screen capture and Adobe Premiere for final editing.

[@abk498]

Thank u very much for making this topic simple and clear to understand. I encourage you to apply it to different aspects of diagnostic imaging.

[@mdabuzar8197]

Thank u so much i am frome india and i am a medical student i am studying radiologist and your lectures help me very good tank u soooo much

[@PhysicsHigh]

Glad they help

[@Ben_Kaushalesh]

Thank you so much. One small query, what about the Earth's magnetic field? Doesn't it interfere with the MRI?

[@PhysicsHigh]

No. MRI B field us of the order of 3-5 Tesla. The earths magnetic field is about 30 micro Tesla. So that’s about 100,000 times weaker.

[@rfmonkey4942]

very nice

[@PhysicsHigh]

Thanks

[@jacyg.3073]

Wonderful explanation, better than I recall it in school. I have one critique. I would expect a scientist and excellent educator to know how to pronounce nuclear. There's only 1 U. It's not nuc-you-ler,. It's nu-cle-er with the middle syllable having a long E and the last syllable ar sounds like er.

[@PhysicsHigh]

You having a go at my accent and pronunciation? 😆

[@zumaxex]

karen please

[@alicepierce2352]

Any chance you could upload one about fMRI / explain the differences for me in a comment! I am a neuroscience student taking a techniques in neuro module and my exam is next friday! I understand that it measures BOLD response as opposed to radiowaves but not quite surely exactly how! Would love your advice this video has saved me for the MRI part!

[@PhysicsHigh]

Love to help you out but at this stage I can’t. But maybe late down the track. Sorry

[@olivianewtonjohn7778]

how can I see the other 4 videos of the mri series?

[@PhysicsHigh]

Check out my medical physics playlist. Also my website. www.physicshigh.com/medical.html

[@TitidaKacaradusty]

How hydrogen only go to the MRI

[@marijanavladislavic8111]

1st they are abundant in human body, 2nd they have odd number of protons,3rd the frequency is used to resonance with the ones for hydrogen atoms

[@harliethomas1378]

So you do an MRI on mice after a diet of drinking heavy water...lol