ARRT MRI Registry Review
Program 2026 | Questions,
Answers & Detailed
Rationales Study Guide
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Updated 2026 Questions and Answers
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Rationales
Included
,If the precessional frequency of the patient's protons is Larmor frequency equation
approximately 21 MHz, what magnetic field strength is
being experienced by the patients protons? W0= B0 x Y
21= 42.6 x (X)
21/42.6 = .4929 (round) = 0.5T
Which of the following is the definition of T1 relaxation? a.
a. the time is takes the net longitudinal magnetization of
protons to grow 63% of its final amplitude
b. the time at which is takes the transverse magnetization
has decayed 63% of its full value
Based on the graph of longitudinal relaxation shown a.
above, which of the following would have the brightest
signal intensity on T1 image?
a. bone marrow
b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
Based on the graph of longitudinal relaxation shown a.
above, which of the following would have the shortest T1
relaxation time?
a. bone marrow
b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
The edema associated with pathology in the brain has a d.
much longer T2 relaxation time than surrounding normal
brain tissue. On a T2 image, what does this result in?
a. isointense between edema and surrounding normal
brain tissue
b. a low signal intensity in the area of edema
c. a signal void in the area of edema
d. a high signal intensity in the area of edema
, Which of the following dephasing mechanisms affects the d.
size of the resulting spin echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions
After a 90 RF pulse, if three 180 RF pulses are applied to d.
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
The MR echo is NOT: d.
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
What is the time from the initial RF excitation pulse to the a.
echo called?
a. TE
b. TI
c. TM
d. TR
The proton's ____ contributes to its magnetic properties. 1. and 2.
1. spinning motion
2. positive change
3. mass
Program 2026 | Questions,
Answers & Detailed
Rationales Study Guide
|Graded A+ | Guaranteed
success|
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
,If the precessional frequency of the patient's protons is Larmor frequency equation
approximately 21 MHz, what magnetic field strength is
being experienced by the patients protons? W0= B0 x Y
21= 42.6 x (X)
21/42.6 = .4929 (round) = 0.5T
Which of the following is the definition of T1 relaxation? a.
a. the time is takes the net longitudinal magnetization of
protons to grow 63% of its final amplitude
b. the time at which is takes the transverse magnetization
has decayed 63% of its full value
Based on the graph of longitudinal relaxation shown a.
above, which of the following would have the brightest
signal intensity on T1 image?
a. bone marrow
b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
Based on the graph of longitudinal relaxation shown a.
above, which of the following would have the shortest T1
relaxation time?
a. bone marrow
b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
The edema associated with pathology in the brain has a d.
much longer T2 relaxation time than surrounding normal
brain tissue. On a T2 image, what does this result in?
a. isointense between edema and surrounding normal
brain tissue
b. a low signal intensity in the area of edema
c. a signal void in the area of edema
d. a high signal intensity in the area of edema
, Which of the following dephasing mechanisms affects the d.
size of the resulting spin echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions
After a 90 RF pulse, if three 180 RF pulses are applied to d.
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
The MR echo is NOT: d.
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
What is the time from the initial RF excitation pulse to the a.
echo called?
a. TE
b. TI
c. TM
d. TR
The proton's ____ contributes to its magnetic properties. 1. and 2.
1. spinning motion
2. positive change
3. mass
