Introducing MRI: Hardware - RF Coils (18 of 56)

www.einstein.yu.edu - The eighteenth chapter of Dr. Michael Lipton's MRI course covers Hardware - RF Coils. Dr. Lipton is associate professor radiology at Albert Einstein College of Medicine and associate director of its Gruss Magnetic Resonance Research Center.

[@iggyimperial5976]

VERY HELPFUL !!!!!

[@carcaperu4041]

1)He keeps stating that there are 6/10000 more parallel to antiparallel proton spin, it is 6/1000000.
2)Why not use superconducting receiver coils? Is due to safety, or price?

[@practiCalfMRI]

Re 2, for human imaging, the noise from the body is far greater than the noise in the receive coil, so there's no real benefit. In high resolution NMR of small samples, however, the noise in the detector coil & preamplifier chain dominate sample noise, so there is a big benefit to using a supercon. receive coil. But. (There's always a "but.") Even then, one must determine the practical consequences of having a high quality factor coil. There are reciprocal effects of coupling a large signal to a high sensitivity coil; phenomena such as "radiation damping." It means that supercon. coils are only really beneficial under certain situations, they aren't universally better than room temp copper coils.

[@aime-noelrain-do7yv]

at 2:34 did you mean to say the electrical current is going into the bore rather than the magnetic field ? I thought B1 had to be perpendicular to B0! .... can someone help ?

[@greatestever8976]

Are you saying our beds can be weaponized? How will these coils interact with 5G?