MRI turo Flashcards
1
Q
what is NMV
A
the number of excess of protons aligned in the parallel direction in contrast to antiparallel direction.
2
Q
what is precession
A
the presence of a secondary motion in the magnetic field.
the circular motion around the magnetic field B0.
3
Q
Is NMV in phase coherence in the Z axis
A
NO
4
Q
what is the coil made from
A
naiobium titanium 0.7mm, thousands of filaments in copper casing
5
Q
what is the superconductor cooled in
A
liquid helium
6
Q
are gradient coils mounted along the x and y plane
A
true
7
Q
gradient coils generate static magnetic field to allow the signal to be localise
A
false- varies with time
8
Q
how to tell when there is effiicient spin lattice tissue energy exchange.
A
rate of brownian moion is similar to the spin of the H nuclei
