ARRT REVIEW MRI REGISTRY REVIEW
PROGRAM QUESTIONS AND ANSWERS LATEST
2025-2026 UPDATE
Which of the following dephasing mechanisms affects the size of the
resulting spin echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions - Answer-d.
After a 90 RF pulse, if three 180 RF pulses are applied to generate three
echoes, which of the following is responsible for the third echo being
much smaller than the first echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions - Answer-d.
,The MR echo is NOT:
a. detected as magnetic changes that induce voltage into an RF coil
b. collected when the magnetization in the transverse plane has been
rephased
c. a tiny signal containing contrast info. necessary for tissue
differentiation
d. collected only one time for a given image - Answer-d.
What is the time from the initial RF excitation pulse to the echo called?
a. TE
b. TI
c. TM
d. TR - Answer-a.
The proton's ____ contributes to its magnetic properties.
1. spinning motion
2. positive change
3. mass - Answer-1. and 2.
,Which of the following is TRUE regarding the hydrogen protons in a
patient's body when placed in the magnet of an MR system?
a. more protons align with the main magnetic field than against the main
magnetic field
b. more protons align against the main magnetic field than with the main
magnetic field
c. equal numbers of protons align against the main magnetic field
d. all of the protons line up perpendicular to the main magnetic field -
Answer-a.
On a T2 image, CSF appears bright because it has a ____ relaxation
time.
a. long T2
b. short T2 - Answer-a.
An RF pulse of what flip angle will maximize the component of the net
magnetization projected into the transverse plane?
a. 180
b. 120
c. 90
d. 45 - Answer-c.
, T1 relaxation refers to ____ relaxation.
a. spin-spin
b. longitudinal
c. phase
d. transverse - Answer-b.
Which of the following statements is false?
a. T1 relaxation refers to longitudinal recovery of magnetization while
T2 relaxation refers to the transverse decay of magnetization
b. T1 relaxation and T2 relaxation occur simultaneously
c. echoes collected in the transverse plane demonstrate only T2
relaxation differences
d. T2 relaxation occurs much more quickly than T1 relaxation - Answer-
c.
If the precessional frequency of the patient's protons is approximately
21 MHz, what magnetic field strength is being experienced by the
patients protons? - Answer-Larmor frequency equation
W0= B0 x Y
21= 42.6 x (X)
PROGRAM QUESTIONS AND ANSWERS LATEST
2025-2026 UPDATE
Which of the following dephasing mechanisms affects the size of the
resulting spin echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions - Answer-d.
After a 90 RF pulse, if three 180 RF pulses are applied to generate three
echoes, which of the following is responsible for the third echo being
much smaller than the first echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions - Answer-d.
,The MR echo is NOT:
a. detected as magnetic changes that induce voltage into an RF coil
b. collected when the magnetization in the transverse plane has been
rephased
c. a tiny signal containing contrast info. necessary for tissue
differentiation
d. collected only one time for a given image - Answer-d.
What is the time from the initial RF excitation pulse to the echo called?
a. TE
b. TI
c. TM
d. TR - Answer-a.
The proton's ____ contributes to its magnetic properties.
1. spinning motion
2. positive change
3. mass - Answer-1. and 2.
,Which of the following is TRUE regarding the hydrogen protons in a
patient's body when placed in the magnet of an MR system?
a. more protons align with the main magnetic field than against the main
magnetic field
b. more protons align against the main magnetic field than with the main
magnetic field
c. equal numbers of protons align against the main magnetic field
d. all of the protons line up perpendicular to the main magnetic field -
Answer-a.
On a T2 image, CSF appears bright because it has a ____ relaxation
time.
a. long T2
b. short T2 - Answer-a.
An RF pulse of what flip angle will maximize the component of the net
magnetization projected into the transverse plane?
a. 180
b. 120
c. 90
d. 45 - Answer-c.
, T1 relaxation refers to ____ relaxation.
a. spin-spin
b. longitudinal
c. phase
d. transverse - Answer-b.
Which of the following statements is false?
a. T1 relaxation refers to longitudinal recovery of magnetization while
T2 relaxation refers to the transverse decay of magnetization
b. T1 relaxation and T2 relaxation occur simultaneously
c. echoes collected in the transverse plane demonstrate only T2
relaxation differences
d. T2 relaxation occurs much more quickly than T1 relaxation - Answer-
c.
If the precessional frequency of the patient's protons is approximately
21 MHz, what magnetic field strength is being experienced by the
patients protons? - Answer-Larmor frequency equation
W0= B0 x Y
21= 42.6 x (X)
