AMRIT PRACTICE 2 Question and answers 100% correct
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Amrt
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Amrt
AMRIT PRACTICE 2 Question and answers 100% correct AMRIT PRACTICE 2
Of the following enhancement agents which is still investigational - correct answer All
MRI magnets that can range in weight from ,000lbs are: - correct answer Permanent
Using a conventional spin-echo multi-slice puls...
AMRIT PRACTICE 2
Of the following enhancement agents which is still investigational - correct
answer ✔All
MRI magnets that can range in weight from 26000-200,000lbs are: - correct
answer ✔Permanent
Using a conventional spin-echo multi-slice pulse sequence, increasing the TE
from 20 msec. to 40 msec will __ the number of slices allowed: - correct
answer ✔Reduce
In the enviorment of an MR main magnetic field most implants that cause a
deflection are considered safe for imaging: - correct answer ✔False
T1 is the characteristic time constant for __________ - correct answer ✔63%
regrowth of longiudinal magnetization
Coils that can, during the MRI process, act as a transmitter, receiver or both
are: - correct answer ✔Radio Frequency coils (transceivers)
The MR signal is strongest when the precessing nuclei are: - correct answer
✔In phase coherence
Increasing which parameter is considered the "best" technique for improving
image quality? - correct answer ✔NEX
When the net magnetixation in the XY plane has ceased to exist the condition
of ____ has been reached. - correct answer ✔Equilibrium
, If a phase resolution of 256 is desired, then the TR must be repeated how
many times? - correct answer ✔256
Spins aligned in the anti-parallel directions are in ____ - correct answer ✔a
high energy state
When describing overall image quality which best describes the difference in
signal intensity between two adjacent structures (A & B) divided by noise (N) -
correct answer ✔Contrast to noise ratio
The primary factor of an inversion recovery pulse sequence is which of the
following parameters? - correct answer ✔TI
Of the following tissues which has the shortest T1 value: - correct answer
✔White matter = Bright
Cooling the electromagnetic coil windings to the point of superconductivity and
then inducing an electric current from an external power supply until the
magnet is at full power is called: - correct answer ✔Ramping Up
A _____ is defined as two magnetic poles of equal strength or magnitude,
opposite in direction and separated by an infinitesmial distance. - correct
answer ✔Dipole
The electromagnetic coil responisble for producing the strong magnetic field of
a superconducting magnet is embedded in a _____ which serves as an
insulter from heat in the event of a quench. - correct answer ✔Copper matrix
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