1
ARRT
ARRT MRI MOCK REGISTRY EXAM QUESTIONS AND
ANSWERS UPDATED (2025/2026) (VERIFIED ANSWERS)
If the heart rate is 70 beats per minute, the R-R interval (effective TR)
would be calculated as such: 60,000 milliseconds (60 seconds per minute,
and there are 1000 milliseconds per second) ÷ 70 (heart rate) which = 857
milliseconds TR.
If the desire is to null the signal from a specific tissue using an inversion
recovery sequence, the inversion time (TI) selected should be ______ of the
T1 relaxation time of that tissue.
A. 37%
B. 43%
C. 63%
D. 69%
E. 82% - ANS >>>69%
If the desire is to null the signal from a specific tissue using an inversion
recovery sequence, the inversion time (TI) selected should be 69% of the
T1 relaxation time of that tissue.
In order to generate thin slices, a ___________ is used.
I. Steep slice selection gradient
ARRT MRI
, 2
ARRT
II. High amplitude slice select gradient
III. Low amplitude slice select gradient
IV. Narrow transmit bandwidth (tBW)
V. Wide transmit bandwidth (tBW)
VI. Narrow receiver bandwidth (brew) - ANS >>>I. Steep slice selection
gradient
II. High amplitude slice select gradient
IV. Narrow transmit bandwidth (tBW)
Magnetic susceptibility artifacts are more prominent with _____________
sequences.
A. Inversion recovery
B. Spin echo
C. Gradient echo
D. Fast spin echo - ANS >>>Gradient echo
Which of the following field strengths would require the shortest TI time to
suppress the signal from fat when performing a STIR sequence in an MRI of
the ankle?
A. 0.5T
B. 1.0T
C. 1.5T
D. 3.0T - ANS >>>0.5T
ARRT MRI
, 3
ARRT
As the TR is increased,
I. SNR is increased
II. Available number of slices is increased
III. T2 information is maximized
A. I only
B. II only
C. I and II only
D. I and III only
E. I, II and II - ANS >>>I and II only
Creating additional images in various planes from a 3D data set is
accomplished by a technique known as:
A. Subtraction
B. Maximum intensity projection (MIP)
C. Region of interest calculation(ROI)
D. Multi-Planar reconstruction (MPR)
E. Minimum Intensity Projection (Mini) - ANS >>>multi-planar reconstruction
(MPR)
In a Fast Spin Echo (FSE) sequence, acquired with a long TE, yielding T2
weighted images, scan time can be reduced by:
A. Increasing the FOV
ARRT MRI
, 4
ARRT
B. Increasing NEX
C. Using shorter ETL
D. Using longer ETL
E. Increasing phase encodings - ANS >>>Using longer ETL
The gradient slew rate is the:
A. Time it takes longitudinal magnetization to regrow
B. Time between TI and initial RF pulse
C. Time it takes for the gradient to reach its full amplitude
D. Rate of speed of ascent or descent of a gradient from zero to its
maximum amplitude - ANS >>>Rate of speed of ascent or descent of a gradient
from zero to its maximum amplitude
Droplet contamination frequently occurs via:
A. Sharing the MRI scanner control mouse
B. Routine breathing
C. Patting on the back
D. Coughing - ANS >>>Coughing
The imaging technique that employs a very rapid pulse sequence while the
patient is at rest or performing a task is:
A. Perfusion
B. Functional MRI
ARRT MRI
ARRT
ARRT MRI MOCK REGISTRY EXAM QUESTIONS AND
ANSWERS UPDATED (2025/2026) (VERIFIED ANSWERS)
If the heart rate is 70 beats per minute, the R-R interval (effective TR)
would be calculated as such: 60,000 milliseconds (60 seconds per minute,
and there are 1000 milliseconds per second) ÷ 70 (heart rate) which = 857
milliseconds TR.
If the desire is to null the signal from a specific tissue using an inversion
recovery sequence, the inversion time (TI) selected should be ______ of the
T1 relaxation time of that tissue.
A. 37%
B. 43%
C. 63%
D. 69%
E. 82% - ANS >>>69%
If the desire is to null the signal from a specific tissue using an inversion
recovery sequence, the inversion time (TI) selected should be 69% of the
T1 relaxation time of that tissue.
In order to generate thin slices, a ___________ is used.
I. Steep slice selection gradient
ARRT MRI
, 2
ARRT
II. High amplitude slice select gradient
III. Low amplitude slice select gradient
IV. Narrow transmit bandwidth (tBW)
V. Wide transmit bandwidth (tBW)
VI. Narrow receiver bandwidth (brew) - ANS >>>I. Steep slice selection
gradient
II. High amplitude slice select gradient
IV. Narrow transmit bandwidth (tBW)
Magnetic susceptibility artifacts are more prominent with _____________
sequences.
A. Inversion recovery
B. Spin echo
C. Gradient echo
D. Fast spin echo - ANS >>>Gradient echo
Which of the following field strengths would require the shortest TI time to
suppress the signal from fat when performing a STIR sequence in an MRI of
the ankle?
A. 0.5T
B. 1.0T
C. 1.5T
D. 3.0T - ANS >>>0.5T
ARRT MRI
, 3
ARRT
As the TR is increased,
I. SNR is increased
II. Available number of slices is increased
III. T2 information is maximized
A. I only
B. II only
C. I and II only
D. I and III only
E. I, II and II - ANS >>>I and II only
Creating additional images in various planes from a 3D data set is
accomplished by a technique known as:
A. Subtraction
B. Maximum intensity projection (MIP)
C. Region of interest calculation(ROI)
D. Multi-Planar reconstruction (MPR)
E. Minimum Intensity Projection (Mini) - ANS >>>multi-planar reconstruction
(MPR)
In a Fast Spin Echo (FSE) sequence, acquired with a long TE, yielding T2
weighted images, scan time can be reduced by:
A. Increasing the FOV
ARRT MRI
, 4
ARRT
B. Increasing NEX
C. Using shorter ETL
D. Using longer ETL
E. Increasing phase encodings - ANS >>>Using longer ETL
The gradient slew rate is the:
A. Time it takes longitudinal magnetization to regrow
B. Time between TI and initial RF pulse
C. Time it takes for the gradient to reach its full amplitude
D. Rate of speed of ascent or descent of a gradient from zero to its
maximum amplitude - ANS >>>Rate of speed of ascent or descent of a gradient
from zero to its maximum amplitude
Droplet contamination frequently occurs via:
A. Sharing the MRI scanner control mouse
B. Routine breathing
C. Patting on the back
D. Coughing - ANS >>>Coughing
The imaging technique that employs a very rapid pulse sequence while the
patient is at rest or performing a task is:
A. Perfusion
B. Functional MRI
ARRT MRI
