Introducing MRI: Introduction to NMR - Longitudinal Component Magnetization (5 of 56)

www.einstein.yu.edu - The fifth chapter of Dr. Michael Lipton's MRI course covers Introduction to NMR in the World of Quantum Mechanics - Longitudinal Component Magnetization. Dr. Lipton is associate professor radiology at Albert Einstein College of Medicine and associate director of its Gruss Magnetic Resonance Research Center.

[@dextervu9585]

Thank you very much for all your videos, and for posting it online. Your work is amazing. Greetings :))

[@efeozkaya992]

Thank you so much for this video lectures!

[@popins9400]

Thank you Sir,
Q1 - 11:28 ,Net magnetization is parallel ?
Q2 - 12:43 , Magnetization is anti parallel?

[@MrYomantanepali]

thank you for sharing this amazing knowledge

[@GeneralRadiology]

Wonderful videos

[@ayilaymms5651]

learn from video very informative

[@zacharyblundell2345]

So are anti-parallel NMV’s stronger than parallel NMV and therefore generate a better signal when we put energy into the system?

[@richarddemmon8516]

Great videos here, thank you Sir for sharing this knowlege.

[@gmcreports3277]

tank u Dr LIPTON FOR SHARING WITH US YOUR KNOWLEGE.an amazing lecture lesson.i wait to join your college very soon.

[@tomaszchorzepa8496]

well, in every (or most of) other book there's a sentence " lower-energy state is slightly favoured, so that there
are more protons spinning parallel than anti-parallel" - why is it here in this video diffrent (more antiparallel then papallel)?

[@richarddemmon8516]

I am confused about this antiparallel NMV too.

[@EinsteinCollegeofMed]

+Tom Chorz The following is from Dr. Lipton in response to the questions and responses shared here:
I am glad to see the questions raised in this thread. Kudos to Robert Mark Wilson for identifying the answer!! I am gratified you are thinking about the physics and reconciling what you have learned before with the lecture.
You are in good company as this question very commonly raised, though it is one I do not typically address until it is raised by students. Kudos to +Robert Mark wilson for identifying the answer!! Hence, it is not covered in the lecture that was posted online. It is true that in a hypothetical system where we are observing the behavior of hydrogen nuclei (spins) in the presence of an externally applied magnetic field (B0), that the spins will be more likely to assume the same orientation as B0. Thus, the net magnetization present (i.e., the NMV) without any other perturbation will have the same orientation as B0. This, I believe, is what you are all expecting. However, this scenario ONLY pertains in the absence of other effects on the magnetic field B0. Specifically, in a diamagnetic environment (i.e., where the other stuff in the sample, aside from spins, has magnetic susceptibility

[@rich2244]

+Albert Einstein College of Medicine however...........?

[@federicocabo5410]

Thanks for your explanation. I wish to know if there is any matereial or book we can read in order to know more about this diamagnetic effect???

[@mapet2002]

I'm still confused. What ist the preferred state of spins in the exsistence of an external magnetic field. Lower energy oder higher energy?