Great video but it has two minor errors that might throw people off. @7:30 The transverse vector decays much more quickly than the longitudinal vector is restored and so the transverse vector decay is effectively independent of the longitudinal relaxation. @8:22 To convert from the k-space (frequency domain) to the spatial domain you take the inverse Fourier transform, not the Fourier transform. Keep up the good work :)
this video is totally helpful for those who took the course and had difficulties but if a person has no idea about MRI before this will seem very complicated
I took a 4th year physics course that discussed how MRI works. I was surprised how complicated it really is. Even K-Space is complicated, you could take a 16 week course on just K-Space.
maybe if you're very low IQ? K space is just spatial frequency space. It just so happens it's the domain in which the signal is sampled. How is that complicated?
Lightbox Radiology Education It should be noted that it is an inverse Fourier transform that is applied (since you're moving from a frequency to a spatial domain).
is it a shame that i only learn fourier series in my mechanical engineering course or is it always linked together (ie fourier series with fourier transform)
Very informative. Got a bit lost in how the XYZ value of a point in space, in the body part, correlates with the X magnet, Y magnet and Z magnet values.
I'll start MRI school at Casa Loma in October. I'm hoping to know pretty much all of the anatomy and physics by then. Hopefully this is what they cover.
Thank you. It's just fascinating how the transverse magnetization and relaxation is actually being received in radio frequency. I suppose that proves that the mouth is not the only thing we communicate with. I could be wrong
@ 2:00 Hydrogen-atoms are spin-1/2 particle. Due to their 'spinning' they don't align with the B-field, but they start precessing. And nobody understands why the magnetization-vector is formed (if there is one).
X axis (horizontal) produces sagital images? And Y gradient produces coronal images? The diagram at 4:10 seems to show the opposite. Can someone clarify please?
imagine the x, y and z vectors as "normal-vectors" (it's the german word for that, dont know the english One atm) (basically a vector that stands perfectly orthogonal on a plane. those planes are the pictures you'll get
Where you wrote Fourier Transform it’s actually where you perform an inverse Fourier Transform, as you first Fourier Transform the digital signal (and you are in k-space), and then you do an inverse FT of the digitalised signal in order to visualise the image
one of the powerful/non destructive non evasive tool for perfect analysis.the Super-con magnet developed for low consumption of lq. helium is a boon to the user.A small version only for orthopedic investigation @ low field designed for arm/leg would be an advantage.
I am still starting to Learn about MRI but the physics is very hard to understand, so if there is any courses to help me through this please drop a link, also thanks for this amazing video ✨
There is a lot of Simultaneous discoveries throughout history It kind of strange take the invention of the radio I pretty breathe taking advancement. The technology that made this discovery possible was available since Maxwell's equations came about but yet it was discovered Simultaneously in Italy and north America almost at the same moment It's just a head scratcher
Actually, the use of the term "randomly" when talking about the alignment of hydrogen in water. In water, the hydrogen atoms tend to bias toward one side of the oxygen (108 degree angles, not 180). It is the spin of the proton that gives it a magnetic field, positive at one end, negative at the other. The oxygen bonds with the hydrogen by pulling away its one electron- and that means that the outer shell of the oxygen is now a negative charge (electrons are negative). At the hydrogen end, where the lonely positive hydrogen protons are both repelling each other, but still held to the oxygen(hence, again, 108 degree angles) The protons in the hydrogens now lack their electrons most of the time, and the positively charged proton give this side a positive charge. So the water molecule now has a positive pole and a negative pole (the reason water is called "polar"). So two neighboring water molecules tend to want to align with each other, positive pole to the other's negative. This can point the water in pure samples into a matrix where most of the water molecules face one direction, and the magnetic poles in the molecules proton wants to align in that matrix (Sometimes that amount of alignment is reduced by other molecules and their charges, as with nitrogen atoms in amino acids- which are in proteins). All this dynamic now performs when placed in a magnetic field and protons are struck with radio waves at their resonant frequency.. So my reason for all this is to make sure we understand the lesser but important role of the electron in all this, since the diagram seems to not be thorough enough in this area.
this 8 minute is greater than the whole semester lecture
When pink floyd said "we dont need no education" everyone thought they were craizy.
soo true haha.. biomedical engineering student here
Yap bro vryy true
😂 True💯 preparing for tomorrow's viva
@@PasanJayaweeraYashoda can u help to find out any ideal book or lectures,, you tube channel for detail study
Great video but it has two minor errors that might throw people off.
@7:30 The transverse vector decays much more quickly than the longitudinal vector is restored and so the transverse vector decay is effectively independent of the longitudinal relaxation.
@8:22 To convert from the k-space (frequency domain) to the spatial domain you take the inverse Fourier transform, not the Fourier transform.
Keep up the good work :)
Definitely the best explanation video I've seen on youtube.
this video is totally helpful for those who took the course and had difficulties but if a person has no idea about MRI before this will seem very complicated
This is a very well done introduction to MRI. Only eight minutes long too. It doesn't waste my time with rambling nonsense.
Keep coming back to this to learn MRI physics. Superb!
Student radiographer and on placement and this was what I needed. Thanks sir.
One of the best intro videos I have seen :D (y)
Thanks. Excellent explanation on the basis of NMR imaging. Lucid and very helpful.
Thanx
Thanks ...I was reading whole day ..and 8 min saved me..Thanks from India 🙏🏻
I took a 4th year physics course that discussed how MRI works. I was surprised how complicated it really is. Even K-Space is complicated, you could take a 16 week course on just K-Space.
maybe if you're very low IQ? K space is just spatial frequency space. It just so happens it's the domain in which the signal is sampled. How is that complicated?
Yoyo you read and copy out of books very well! Hope your proud of your little ego self!
still seems like magic
Danny Kendra hi
Thank you Lightbox Radiology Education! I am taking an Intro to fMRI class this semester and this video is really helpful!
Are you still in the career?
Great explanation sincerely. The only thing you could have emphasised more was how the image formations changes among T1 and T2 sequences.
yeah im going to have to watch this a few times! but a very imformative video.
This is a great video. It's actually helped me out a lot writing a short essay on MRI scan for a master course.
Understood this better since i've been thru MRI Physics class.
Great introductory video! Thank you!
Great video. Cleared a lot of confusion. Thanks!
You sir have been of great help to me. I thank you wholeheartedly.
This was such a great video, a concept that was so hard to understand got completely understood. Thank you!
The video is so good
Well explained
Awesome job!! Very clear and concise, thank you for uploading this video!!
Thank you very much for the Video. It Helps me a lot.
Well Explained.
Best review and easy to understand breakdown of MRI physics.
wow wow great contribution
Wow, since I learned about fourier transformations I keep seeing it everywhere.
It is impossible to escape Fourier transformations.
Lightbox Radiology Education It should be noted that it is an inverse Fourier transform that is applied (since you're moving from a frequency to a spatial domain).
is it a shame that i only learn fourier series in my mechanical engineering course or is it always linked together (ie fourier series with fourier transform)
Freak I am so jealous of you dude
Have not learned about that yet in my radiology course I'll look into it might help me be ahead in future courses. Thanks
Very informative. Got a bit lost in how the XYZ value of a point in space, in the body part, correlates with the X magnet, Y magnet and Z magnet values.
I repeated this video 3 times , how much is informative
Well done end-to-end explanation!
Excellent video for 8 mts whole MRI study pls update all videos sir tnq u so much .
an absolute outstanding job!
Need to do a prensentation about contrast agents in MRI. Video helped a lot as a basic overview. Thanks
Thank you so for the elaborate explanation
Great video, simple n easy to understand 👍
Perfect for medical students, thank you!
Very good explanation! Using the info from this for a biopsychology presentation.
Excellent video, helped massively with my assignment on medical physics.
Wow its great. Real engineering.
Great leacture
I'll start MRI school at Casa Loma in October. I'm hoping to know pretty much all of the anatomy and physics by then. Hopefully this is what they cover.
Best lecture ever 🤟🤟
Very well done.
thank you so much, this video helped me a lot understanding what´s happening during pulsed NMR experiment
Amazing, enjoyed watching:) thanks a lot!
Thanks. Excellent that video is informative.
In 8 min!!! Awsome thanks.
Excellent!
Great help before the exam!!!!
This is best video i seen on youtube on this topic. its really clear my concepts..thanks a lot. Dr M A Qureshi.
a good video oh ma gosh, i finally understood T1 and t2 hooray!
You saved my life, THANK YOU
Thanks a lot, this is the best Video for learning MRI Physics!! :)
Great explaination
Very well explained, thanks 🙏
Great video!
Great vedio. Could you do more vedio on MRI physics
This was really helpful. Thank you!
Thankyou for this video on Introduction to MRI Physics-Alexis Kironde
Great job dude.
Awesome🙏🙏🙏
very informative, thank you for the video.
Thanks bro❤❤❤❤❤❤❤❤
Well done!
Amazing ♥️♥️. I wish I could find videos with more detail on T1 and T2.
awesome video, helped a lot .
thx
Thank you. It's just fascinating how the transverse magnetization and relaxation is actually being received in radio frequency. I suppose that proves that the mouth is not the only thing we communicate with. I could be wrong
Thank you... It helped so much... 😊
Thank you very much very helpful.
Great video, it helped a lot! Thank you :-)
Easily the coolest part of physics
@ 2:00 Hydrogen-atoms are spin-1/2 particle. Due to their 'spinning' they don't align with the B-field, but they start precessing. And nobody understands why the magnetization-vector is formed (if there is one).
I think at the end it is to do inverse-Fourier Transformation to get the image in time domain.
VERY HELPFUL, THANX A LOT
Very helpful
wonderful
excellent!
That's really awesome, But I have a question, Why we use 90degree pulse for RF? and how is it work?
X axis (horizontal) produces sagital images? And Y gradient produces coronal images? The diagram at 4:10 seems to show the opposite. Can someone clarify please?
imagine the x, y and z vectors as "normal-vectors" (it's the german word for that, dont know the english One atm) (basically a vector that stands perfectly orthogonal on a plane. those planes are the pictures you'll get
very useful, thanks a lot,/
Perfectly elaborated
YOU ARE ALWAYS LOVING-ALEXIS KIRONDE
Where you wrote Fourier Transform it’s actually where you perform an inverse Fourier Transform, as you first Fourier Transform the digital signal (and you are in k-space), and then you do an inverse FT of the digitalised signal in order to visualise the image
Very educational for a novice
Can you please upload the pdf of the notes displayed in the video ?
one of the powerful/non destructive non evasive tool for perfect analysis.the Super-con magnet developed for low consumption of lq. helium is a boon to the user.A small version only for orthopedic investigation @ low field designed for arm/leg would be an advantage.
A small orthopedic unit was available 20 years ago. No more.
I think GE makes them
MEDICAL IMAGING TECHNIQUES IS AN IMPORTANT ALL OVER THE WORLD CHOOCE THE SWUITABLE ONE
Is it possible to access the animation script ? thank you!
Nice lect. Sir tq vm
thank you!
Can anyone suggest recent books or articles to make this clearer, please?
I am still starting to Learn about MRI but the physics is very hard to understand, so if there is any courses to help me through this please drop a link, also thanks for this amazing video ✨
So basically, MRI show tissue in fluid, correct?? And when you see a metastases, that’s fluid buildup.
05:22 T1,T2 relaxation
thank you
There is a lot of Simultaneous discoveries throughout history
It kind of strange take the invention of the radio I pretty breathe taking advancement. The technology that made this discovery possible was available since Maxwell's equations came about but yet it was discovered Simultaneously in Italy and north America almost at the same moment
It's just a head scratcher
My Forever Passion is to ALWAYS BE LOVING-ALEXIS KIRONDE
Actually, the use of the term "randomly" when talking about the alignment of hydrogen in water. In water, the hydrogen atoms tend to bias toward one side of the oxygen (108 degree angles, not 180). It is the spin of the proton that gives it a magnetic field, positive at one end, negative at the other. The oxygen bonds with the hydrogen by pulling away its one electron- and that means that the outer shell of the oxygen is now a negative charge (electrons are negative). At the hydrogen end, where the lonely positive hydrogen protons are both repelling each other, but still held to the oxygen(hence, again, 108 degree angles) The protons in the hydrogens now lack their electrons most of the time, and the positively charged proton give this side a positive charge. So the water molecule now has a positive pole and a negative pole (the reason water is called "polar").
So two neighboring water molecules tend to want to align with each other, positive pole to the other's negative. This can point the water in pure samples into a matrix where most of the water molecules face one direction, and the magnetic poles in the molecules proton wants to align in that matrix (Sometimes that amount of alignment is reduced by other molecules and their charges, as with nitrogen atoms in amino acids- which are in proteins). All this dynamic now performs when placed in a magnetic field and protons are struck with radio waves at their resonant frequency..
So my reason for all this is to make sure we understand the lesser but important role of the electron in all this, since the diagram seems to not be thorough enough in this area.
i dont understand shiit
only people with brains only understand
I don't understand it either and I know I have a brain.
😂🤣😩
Title: "Introduction to MRI"
Me after 30 seconds into the video: 😅😳 I'm suffering
I recommend study more from the below link after watching this introduction version. Hope this help. th-cam.com/video/djAxjtN_7VE/w-d-xo.html
tnxs alot😍