Please, could you share list of web pages and documents (bibliography), which you used in making this video? I'm writing Bachelor's degree work and I wrote some of information you mentioned in video, but I have to cite them :( It would be very useful for me
The return of net magnetization in the longitudinal plane does not give off a signal. This means that T1 cannot be measured directly. Please, tell, how T1 is actually measured
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 TH-cam, that's saying a lot.
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 :)))
Yep some text books are terrible. I threw my general Chem text book in a recycling bin so no one will ever read it because there was only a tiny tiny part of a section of a chapter that covered Quantum mechanic.
I am a postgraduate Physics Student and I had some troubles with the textbook explanations and this really made my day. You made it look so easy, it's incredible. Thanks.
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.
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.
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.
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 TH-camrs. 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.
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!
This is one of the most extensive explanations of MRI on youtube. Many thanks for the effort you've put to make this video. It's sad that there is no part 2.
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!
This explanation is so clear and concise - excellent material for a resident radiologist. Please upload the second part, we're all waiting to learn more! :)
I’m only 8 minutes in and it has answered a bunch of questions that I always ask myself when I’m in there. Doing my entire spine was a long time to think about stuff. Thank you.
I really like, how you try (and succeed) to be scientifically correct but still being able to explain everything simple enough for everyone to understand. Waiting for a second part!
The most glaring property of your video and succinct explanations is the ' lack of ' presumptions of the viewers likely ignorance which for me is most effective not to mention pure and personallt deeply appreciated. Thank you!
I'm getting a PhD in a chem lab that uses a lot of solid state NMR, so I was familiar with T1 and T2, but not how the weighting works or how pulse angles mesh with QM. I learned a lot! I can't wait to watch part 2 in a bit. I wonder if our pulse programs are different
Amazing you share such high quality teaching with the world for free like this! Immensely appreciated! And if you can't already tell how much we all love your video, I'm also going to ask for Part II...
I dont write that much comments, but this video deserves it. I am studying medical technologys in germany and this video explained a whole subject to me. Its incredible good. Thank you!!!!!!!!!
I have no previous knowledge of physics whatsoever but, for various reasons, I have to study the physics behind imaging methods. Thank you very much, even with my complete ignorance I was able to follow most of your video. Your exposition was really brilliant. I hope you are a teacher!
My dad worked for 15 years or so on MRIs before transferring to another company, this is such a cool explanation of how they actually work! I'm more used to the context of NMR, since I'm an analytical chemist
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!
Brilliant explanation. The best I have seen! I have been struggling to visualise this for years. The animations are great and your delivery style is perfect . . . .Many thanks
wow, 10 minutes into the video and Im blown by the amazing explanation. I never understood physics in childhood and this was wonderful. Thanks a lot for helping us out
Hi thePIRL, Congratulations for this excellent video. The animations and your very clear and smooth explanation really helped a lot to grasp the concepts. It would be fantastic if you could give us a next step with another video going through MR imaging topics like Frequency encoding, Phase encoding and Slice selection. Please! All the best!
I have garnered a fascination for this technology recently, and I really want to learn more about this! Partly because, to me, the fundamentals are important but it also is necessary to understand how the technology uses the physics to convey the information. I can't wait to see more on this. I absolutely agree!
This video is incredibly good, i am trying to understand to MRI to shortly explain it in a radiomic master thesis, and this is by far the best I have seen, also promps for actually talking about the boltsman equation, it reminds me of semiconductor stuff !
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!
This explanation was so clear , so good!! Helps me a lot, cz my textbook didn't to a thing. Thank you so much for putting energy into doing this video. Please make some more about CT and MRI.
This is incredible. I study pure and applied mathematics but also enjoy physics and any other field that studies a complex system. This video and explanation is so well done. Thank you.
Dude you're amazing, PLEASE upload part 2, preferably some days before the 7th of january, when I have my MRI test haha. My teachers are good but sometimes it's more convenient to watch it on YT, for the possibility to rewind, recap and see different figures or animations.
33:50 where I said, the best explanation ever!!! I am a 4th year med student and wanna go into radiology. I literally spent days to understand this. Working on this video for a few hours made it clear! Now I can move on to mammography :))) Thank you!!!!! Greetings from Germany.
I am so happy I found this video!!! I’ve been slacking off cuz it’s been difficult to understand but you really explain so crystal clear thank you so much 😊
This 43 min presentation requires more repeated listening to understand the principle behind this. I am not technical, but able to follow what is presented. Appreciate the efforts for preparing this presentation with animations.
Hands down! Truly appreciate your videos ! This is a must-watch for learners who struggle to understand this topic. Although I have to rewind it many times to make sure that I get all important points, I believe that I learn it faster than reading textbook. I hope that you will create more contents in your channel.
this is amazing, really hope you can make it back with a part 2! would be lovely from you to add in the description or in some comment recommended literature from where you study, thanks!
A few questions please: I'm trying to build a mechanistic understanding of how the energy states of multiple nuclei (time 35:15 and on) give rise to the overall magnetization vector. This brings the following questions: 1. I understand that how only the polarized (unpaired) nuclei contribute to longitudinal (z) magnetization. I suppose the same holds for the transverse (xy) direction of magnetization, but how come? What prevents ALL of the nuclei from contributing to the transverse magnetization, when they can all seemingly precess in sync? 2. How can this concept of two energy states explain flipping the magnetization by more than 90° or 180°? It is obvious how synchronizing the the nuclei's precession by the the RF pulse increases the transverse magnetization and how excitation of the nuclei reduces and then reverses the longitudinal magnetization, but what makes the transverse magnetization decrease when the RF pulse continues after the 90° flip, and similarly, why does the longitudinal magnetization go back again after the 180°? What prevents the continuing RF pulse from just exciting more and more nuclei, making stronger and stronger anti-parallel magnetization? Awesome videos BTW! Thanks a bunch.
Hello. I wanna ask about the flip angle part starting at 14:45. As I was taught at the university, it was said that the flip angle is not due to a single spin having the continuous flip angle but as a result of the net moment of a bunch of in phase spins with different proportion of spin up and down. But here comes my issue for several years, as I cannot find the answer for this problem, it is that if for a single spin only spin up or down can present, quantizedly, then the net moment on xy plane Mxy is only due to the phase of those spins, and Mz is only due to the proportion of spin up and down, then Mxy and Mz should be totally independent to each other that a 90 degree pulse is only flipping spins to down so that no. of up = down. It cancelled out the Mz vector and push the spins in phase so only the Mxy plane of vector remains. But the value of Mz and Mxy should be independent, that a 90 degree pulse should not flip the net moment that the Mxy = the original Mz, because those two are from two independent phenomenon! Can you answer my question or give me some source to look at it?
@@pioupioupouetpouet I found this source on myself. This is very difficult as too much misleading and incorrect information getting spread like this video and almost nobody points out some obvious logical paradox like we did. I am surprised till this day incorrect interpretation is still being taught to new students. It is very sad.
@@pioupioupouetpouet somehow I found every time I post comments with a link they are auto deleted. So I will post them again without URL. The video is wrong, so are most of the textbooks in MRI. QUESTIONS AND ANSWERS IN MRI is a very good website for correct and accurate interpretation and explanation. For how 90-degree pulse actually work: /phase-coherence.html
Part 2 on the Spin Echo is now up and can be viewed here: th-cam.com/video/M7yh0To6Wbs/w-d-xo.html . Enjoy!
You're just awesome
Subscribed and enabled all notifications! Thank you so much!
Please, could you share list of web pages and documents (bibliography), which you used in making this video? I'm writing Bachelor's degree work and I wrote some of information you mentioned in video, but I have to cite them :( It would be very useful for me
The return of net magnetization in the longitudinal plane does not give off a signal. This means that T1 cannot be measured directly. Please, tell, how T1 is actually measured
Sir plz make part 4 ,other remaining topics u r awesome ,u make the mri concept easier plz sir ,I need to know for my exam
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 TH-cam, that's saying a lot.
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 :)))
😃😃😃
Yep some text books are terrible. I threw my general Chem text book in a recycling bin so no one will ever read it because there was only a tiny tiny part of a section of a chapter that covered Quantum mechanic.
Bro I’m stuck at 4mins
Same
Metoo jaja
This is outrageously good content. The visuals are so well done and so important for a good understanding.
I am a postgraduate Physics Student and I had some troubles with the textbook explanations and this really made my day. You made it look so easy, it's incredible. Thanks.
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.
Actually even if you were physician you won’t necessarily understand since this is Physics not medicine.
@@NFL_31258radiologists are doctors and need to know this and more
The lecture literally saves my life! The explanation is so straightforward and easy to follow. Will recommend it to my mates. Cheers!
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.
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.
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 TH-camrs. 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.
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!
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
It's a wonderful presentation. A melodious and clear voice. No complexity, no confusion and simple enough. Thanks a lot
This is one of the most extensive explanations of MRI on youtube. Many thanks for the effort you've put to make this video. It's sad that there is no part 2.
part 2 and 3 is out now! the link is in the description. 🤓!
Thank you so much for this lecture. Probably the highest quality, clearest I've heard without oversimplifications.
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!
This explanation is so clear and concise - excellent material for a resident radiologist. Please upload the second part, we're all waiting to learn more! :)
Thanks. This is the most illustrative and intuitive one video in youtube to understand MRI.
I’m only 8 minutes in and it has answered a bunch of questions that I always ask myself when I’m in there. Doing my entire spine was a long time to think about stuff. Thank you.
I really like, how you try (and succeed) to be scientifically correct but still being able to explain everything simple enough for everyone to understand. Waiting for a second part!
Great video, you really touch on the physicals portions of MRI better than any other video I have come across.
I don't really know who you are, but what I know is that I'm forever grateful to you for making this video! thank you so much!
Please meka a part 2!!! is was by far the best explanation I found on TH-cam!
The most glaring property of your video and succinct explanations is the ' lack of ' presumptions of the viewers likely ignorance which for me is most effective not to mention pure and personallt deeply appreciated. Thank you!
I'm getting a PhD in a chem lab that uses a lot of solid state NMR, so I was familiar with T1 and T2, but not how the weighting works or how pulse angles mesh with QM. I learned a lot! I can't wait to watch part 2 in a bit. I wonder if our pulse programs are different
Great Video, Thank you!
I’m waiting for part II.
Amazing you share such high quality teaching with the world for free like this! Immensely appreciated! And if you can't already tell how much we all love your video, I'm also going to ask for Part II...
I haver never enjoyed MRI physic classes like this before it feels like I am watching documentary. Kudos to this channel !
I need the second part, I have an exam this week 😭😭😭😭😭
you can't abandon us like this
same bro same :'(
Which course are u pursuing
:) :))((())))))))))
I dont write that much comments, but this video deserves it. I am studying medical technologys in germany and this video explained a whole subject to me. Its incredible good. Thank you!!!!!!!!!
One of the best explanation of the physics behind MRI I've listened to...Great job!
I'm an MR physicist, and I'm very picky about getting the physics correct, and this video is very good! Kudos!
Few minutes into this video and I have already understood some concepts that I have been mistaken about for years. Thank you so much for the effort.
What a time to be alive.. thank you for such a visually pleasing and concise explanation
I have no previous knowledge of physics whatsoever but, for various reasons, I have to study the physics behind imaging methods. Thank you very much, even with my complete ignorance I was able to follow most of your video. Your exposition was really brilliant. I hope you are a teacher!
ohh my God, thank you very much, i spent two weeks trying to understand this chapter but one video made it all clear
the best MRI video I have watched so far. thank you for your generous sharing!
Sir, this is an excellent breakdown of how NMR/MRI works. 10/10 will watch again, thx
My dad worked for 15 years or so on MRIs before transferring to another company, this is such a cool explanation of how they actually work! I'm more used to the context of NMR, since I'm an analytical chemist
Most interesting! I'm not in the industry at all but i managed to follow the concept because you explain it so clearly.
Tremendous video! The very best on this matter so far imo. Thank you.
Put your hands up for Part 2! Looking forward.
A big thank you to the content creator, really very nice illustration. I stopped the lecture in between and expressed my gratitude towards you.
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!
Brilliant explanation. The best I have seen! I have been struggling to visualise this for years. The animations are great and your delivery style is perfect . . . .Many thanks
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.
Brilliant Job!!!!!! Thank you so much for making it!!!!! Waiting for part 3 and more!!
This is the best animation and teaching video I've found. Thanks for this!
Finally a very good video on this matter, thank you so much, we're still waiting for the second part.
Best explanation of MRI I have encountered. Thank you so much!
Watching your series of lectures helped me understand NMR and pass my last university exam. Thank you for your work! It was really clear and helpful.
Brilliant. Thank you so much for putting in the time and effort to make this available. Are you doing a Part2 ?
Finally someone on TH-cam that doesn't say spin is the rotation of a particle around its axes. Thank God, my faith in humanity has been restored.
I have seen few MRI videos but this was the best. Thank you. hoping for more lectures.
wow, 10 minutes into the video and Im blown by the amazing explanation. I never understood physics in childhood and this was wonderful. Thanks a lot for helping us out
Super sober and clean explanation. Very helpful!
Hi thePIRL,
Congratulations for this excellent video. The animations and your very clear and smooth explanation really helped a lot to grasp the concepts.
It would be fantastic if you could give us a next step with another video going through MR imaging topics like Frequency encoding, Phase encoding and Slice selection.
Please!
All the best!
I have garnered a fascination for this technology recently, and I really want to learn more about this! Partly because, to me, the fundamentals are important but it also is necessary to understand how the technology uses the physics to convey the information. I can't wait to see more on this. I absolutely agree!
This video is incredibly good, i am trying to understand to MRI to shortly explain it in a radiomic master thesis, and this is by far the best I have seen, also promps for actually talking about the boltsman equation, it reminds me of semiconductor stuff !
Hello from Spain. That this is the best explanation of MRI they've encountered.
Always cool when you come across a video that without any prompting whatsoever makes you like and subscribe
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!
one of the best explanations about MRI on youtube, thanks for sharing
this is the best MRI video out on youtube, thank you!
This explanation was so clear , so good!! Helps me a lot, cz my textbook didn't to a thing. Thank you so much for putting energy into doing this video. Please make some more about CT and MRI.
this video is truely fantastic! The Visuals are great and I like also that you make remarks to the more complicated physics
This is incredible. I study pure and applied mathematics but also enjoy physics and any other field that studies a complex system. This video and explanation is so well done. Thank you.
Please do a Part 2! I was really looking forward to bring-watching this lol -- subscribed though!
Excellent video. Very well presented with clear visuals. Looking forward to part II. Thanks
Dude you're amazing, PLEASE upload part 2, preferably some days before the 7th of january, when I have my MRI test haha. My teachers are good but sometimes it's more convenient to watch it on YT, for the possibility to rewind, recap and see different figures or animations.
Love this! I have my exam this Monday (28th of January)... It would save me so much time! This video is indeed Amazing!
Hi. What texts do you use to study this topic?
Best description i ever seen about MRI, thank you
Thank you very much! Much better than trying to imagine from the text book. Instant clarity!
33:50 where I said, the best explanation ever!!! I am a 4th year med student and wanna go into radiology. I literally spent days to understand this. Working on this video for a few hours made it clear! Now I can move on to mammography :))) Thank you!!!!! Greetings from Germany.
Neslihan!!🙋♂️🙋♂️
Excellent tutorial :D. I am looking forward to Part 2!
This is brilliant content. Thank you for taking the time to produce, explain and visualize. Very much appreciated
Man this is the best video ever i got in you tube about mri .
I am so happy I found this video!!! I’ve been slacking off cuz it’s been difficult to understand but you really explain so crystal clear thank you so much 😊
This 43 min presentation requires more repeated listening to understand the principle behind this. I am not technical, but able to follow what is presented. Appreciate the efforts for preparing this presentation with animations.
Superb Job. Please come back and make more videos on this subject, you could save so many lives :D
Best MRI video I have seen. The animations are super helpful! Thanks
Both the animation and explanation are fantastic. Thank you very much!
Excellent video. You have a great talent for creating visualizations. Thank you!
excellent animations, the right ammount of math and very pedagogic. Bravo!
Hands down! Truly appreciate your videos ! This is a must-watch for learners who struggle to understand this topic. Although I have to rewind it many times to make sure that I get all important points, I believe that I learn it faster than reading textbook. I hope that you will create more contents in your channel.
There were some sharp cookies who came up with this (MRI). Fascinating. Thanks for sharing!
this is amazing, really hope you can make it back with a part 2! would be lovely from you to add in the description or in some comment recommended literature from where you study, thanks!
This is magnificent content I really hope to see more content from you in the future
This is a brilliant video, some of the clearest explanations I've heard! I hope one day you can make part 2.
Very helpful as a radiology student trying to understand MRI. Curious to see part 2!
My brain is broken after listening to this - I love it! Thank you!!
This is pure gold!!Fantastic explanation!!
This video deserves a lot more views
This is such a phenomenal explanation, absolutely incredible work
This is exceptionally high quality content. Thank you very much for your time and effort. We really appreciate it.
This was an excellent explanation! Thank you so much for creating it
Hi amazing video, please get the second part, this video was amazingly helpfull, it would be great if you uploaded a second part. Thank you very much!
A few questions please: I'm trying to build a mechanistic understanding of how the energy states of multiple nuclei (time 35:15 and on) give rise to the overall magnetization vector. This brings the following questions:
1. I understand that how only the polarized (unpaired) nuclei contribute to longitudinal (z) magnetization. I suppose the same holds for the transverse (xy) direction of magnetization, but how come? What prevents ALL of the nuclei from contributing to the transverse magnetization, when they can all seemingly precess in sync?
2. How can this concept of two energy states explain flipping the magnetization by more than 90° or 180°? It is obvious how synchronizing the the nuclei's precession by the the RF pulse increases the transverse magnetization and how excitation of the nuclei reduces and then reverses the longitudinal magnetization, but what makes the transverse magnetization decrease when the RF pulse continues after the 90° flip, and similarly, why does the longitudinal magnetization go back again after the 180°? What prevents the continuing RF pulse from just exciting more and more nuclei, making stronger and stronger anti-parallel magnetization?
Awesome videos BTW! Thanks a bunch.
This is brilliant. I am so looking forward to part 2
Hello. I wanna ask about the flip angle part starting at 14:45. As I was taught at the university, it was said that the flip angle is not due to a single spin having the continuous flip angle but as a result of the net moment of a bunch of in phase spins with different proportion of spin up and down.
But here comes my issue for several years, as I cannot find the answer for this problem, it is that if for a single spin only spin up or down can present, quantizedly, then the net moment on xy plane Mxy is only due to the phase of those spins, and Mz is only due to the proportion of spin up and down, then Mxy and Mz should be totally independent to each other that a 90 degree pulse is only flipping spins to down so that no. of up = down. It cancelled out the Mz vector and push the spins in phase so only the Mxy plane of vector remains. But the value of Mz and Mxy should be independent, that a 90 degree pulse should not flip the net moment that the Mxy = the original Mz, because those two are from two independent phenomenon! Can you answer my question or give me some source to look at it?
I have the exact same understanding issue. If you found the answer, please share it with us!:)
@@pioupioupouetpouet I found this source on myself. This is very difficult as too much misleading and incorrect information getting spread like this video and almost nobody points out some obvious logical paradox like we did. I am surprised till this day incorrect interpretation is still being taught to new students. It is very sad.
@@pioupioupouetpouet somehow I found every time I post comments with a link they are auto deleted. So I will post them again without URL. The video is wrong, so are most of the textbooks in MRI. QUESTIONS AND ANSWERS IN MRI is a very good website for correct and accurate interpretation and explanation. For how 90-degree pulse actually work: /phase-coherence.html
@@pioupioupouetpouet For why spin down and spin in actually contribute to Mz: /quantum-reality.html
@@pioupioupouetpouet Just google for QUESTIONS AND ANSWERS IN MRI and paste the last part of the URL to go to the link I gave you.
Top notch work!!!! Looking forward to all your future videos!! Thank you!!
Great video. This cleared many doubts I had about NMR.
There is no part 2? How is it possible??? This explanation was AMAZING!!! Don't stop this free and simple way to learn pls