ARRT MRI MOCK TRIAL QUESTIONS AND VERIFIED
DETAILED ANSWERS 100% GUARANTEED PASS
ALREADY GRADED A+.
◉The first major branch of the abdominal aorta is the _______.
A. Superior mesenteric artery
B. Inferior mesenteric artery
C. Renal artery
D. Celiac artery
E. Iliac artery. Answer:Celiac artery
◉What would the scan time be in a 3D volume acquisition as follows: TR 24 ms, TE 7 ms, Flip
Angle 15°, FOV 20cm, 2mm slice thickness, 76 slices, 176 x 256 matrix, 1 NEX?
A. 2min 31sec
B. 3min 21sec
C. 3min 35sec
D. 5min 21sec
E. 5min 35sec. Answer:5min 21sec
◉Which parameter combination will yield the best spatial resolution?
A. 3mm slice thickness, 192 x 256 matrix
B. 3mm slice thickness, 224 x 256 matrix
C. 3mm slice thickness, 256 x 256 matrix
D. 5mm slice thickness, 192 x 256 matrix
E. 3mm slice thickness, 208 x 256 matrix. Answer:3mm slice thickness, 256 x 256 matrix
◉The extent to which a material or tissue becomes magnetized in an external magnetic field is
called:
A. Magnetic inversion
B. Magnetic susceptibility
,C. Contrast to noise ratio
D. Signal to noise ratio
E. Time tau. Answer:Magnetic susceptibility
◉If the third ventricle is dilated, but the fourth ventricle is not, there would then be pathology
associated with:
A. Aqueduct of Sylvius
B. Insular cortex
C. Basal ganglia
D. Corpus callosum
E. Internal capsule. Answer:Aqueduct of Sylvius
◉A major advantage of a 2D time of flight over a 3D time of flight sequence is the ability to:
A. Determine the precise, accurate percentage of stenosis
B. Better image retrograde flow
C. Complete image acquisition in twice the time
D. Image larger areas without saturation of flowing blood. Answer:Image larger areas without
saturation of flowing blood
◉Reducing the FOV by a factor of 2 will reduce the voxel volume by a factor of:
A. 1.41
B. √2
C. √4
D. 2
E. 4. Answer:4
◉Reducing the FOV (field of view) only will result in:
A. Decreased spatial resolution
B. Increased signal-to-noise
C. Decreased signal-to-noise
D. Increased T1 contrast
E. More slices per TR
,F. A and C. Answer:A and C
◉Which of the following parameter adjustments reduce the overall SNR in an MR image?
I. Decrease TR
II.Reduce Phase Matrix
III. Reduce Pixel Size
IV. Decrease FOV
V. Reduce rBW
VI. Increase rBW
VII. Increase NEX
VIII. Decrease NEX
IX. Increase ETL
X. Decrease ETL. Answer:I, III, IV, VI, VIII and IX
◉Phase contrast MRA techniques produce images in which the signal intensity within the vessel
is dependent upon the:
A. Shortening of the T1 time of blood
B. Velocity of the flowing blood
C. Larmor frequency of arterial versus venous blood
D. Rate of gadolinium contrast injection
E. Timing of gadolinium contrast injection
F. A, D and E. Answer:Velocity of the flowing blood
◉In a Fast Spin Echo (FSE) sequence, acquired with a short echo time (TE), yielding T1 or PD
weighted images, blurring can be reduced by:
A. Increasing the FOV
B. Increasing NEX
C. Using shorter ETL
D. Using longer ETL
E. Increasing phase encodings. Answer:Using shorter ETL
◉Calculate the dose of contrast (0.1mmol/kg) that should be administered to a patient
weighing 176 lbs with normal kidney function in a routine MR examination.
, A. 6mL
B. 8mL
C. 12mL
D. 16mL
E. 18mL. Answer:16mL
◉_______ is when only half the views of k-space are filled in the frequency axis.
A. Anti aliasing
B. Parallel imaging
C. Half fourier
D. Partial or fractional echo
E. 1/2 TE (TAU). Answer:Partial or fractional echo
◉Fat has a _______ T1 relaxation time and a ________ T2 relaxation time.
A. Long; long
B. Short; short
C. Short; long
D. Long; short. Answer:Short; short
◉Increasing the flip angle:
A. Doubles the SNR proportional to the angle increased
B. Reduces SNR
C. Increases SNR up to the Ernst angle
D. Does not affect SNR. Answer:Increases SNR up to the Ernst angle
◉Which of the following parameter adjustments will SHORTEN scan time in an MR pulse
sequence?
I. Decrease TR
II. Increase TR
III. Increase ETL
IV. Decrease ETL
V. Decrease NEX
DETAILED ANSWERS 100% GUARANTEED PASS
ALREADY GRADED A+.
◉The first major branch of the abdominal aorta is the _______.
A. Superior mesenteric artery
B. Inferior mesenteric artery
C. Renal artery
D. Celiac artery
E. Iliac artery. Answer:Celiac artery
◉What would the scan time be in a 3D volume acquisition as follows: TR 24 ms, TE 7 ms, Flip
Angle 15°, FOV 20cm, 2mm slice thickness, 76 slices, 176 x 256 matrix, 1 NEX?
A. 2min 31sec
B. 3min 21sec
C. 3min 35sec
D. 5min 21sec
E. 5min 35sec. Answer:5min 21sec
◉Which parameter combination will yield the best spatial resolution?
A. 3mm slice thickness, 192 x 256 matrix
B. 3mm slice thickness, 224 x 256 matrix
C. 3mm slice thickness, 256 x 256 matrix
D. 5mm slice thickness, 192 x 256 matrix
E. 3mm slice thickness, 208 x 256 matrix. Answer:3mm slice thickness, 256 x 256 matrix
◉The extent to which a material or tissue becomes magnetized in an external magnetic field is
called:
A. Magnetic inversion
B. Magnetic susceptibility
,C. Contrast to noise ratio
D. Signal to noise ratio
E. Time tau. Answer:Magnetic susceptibility
◉If the third ventricle is dilated, but the fourth ventricle is not, there would then be pathology
associated with:
A. Aqueduct of Sylvius
B. Insular cortex
C. Basal ganglia
D. Corpus callosum
E. Internal capsule. Answer:Aqueduct of Sylvius
◉A major advantage of a 2D time of flight over a 3D time of flight sequence is the ability to:
A. Determine the precise, accurate percentage of stenosis
B. Better image retrograde flow
C. Complete image acquisition in twice the time
D. Image larger areas without saturation of flowing blood. Answer:Image larger areas without
saturation of flowing blood
◉Reducing the FOV by a factor of 2 will reduce the voxel volume by a factor of:
A. 1.41
B. √2
C. √4
D. 2
E. 4. Answer:4
◉Reducing the FOV (field of view) only will result in:
A. Decreased spatial resolution
B. Increased signal-to-noise
C. Decreased signal-to-noise
D. Increased T1 contrast
E. More slices per TR
,F. A and C. Answer:A and C
◉Which of the following parameter adjustments reduce the overall SNR in an MR image?
I. Decrease TR
II.Reduce Phase Matrix
III. Reduce Pixel Size
IV. Decrease FOV
V. Reduce rBW
VI. Increase rBW
VII. Increase NEX
VIII. Decrease NEX
IX. Increase ETL
X. Decrease ETL. Answer:I, III, IV, VI, VIII and IX
◉Phase contrast MRA techniques produce images in which the signal intensity within the vessel
is dependent upon the:
A. Shortening of the T1 time of blood
B. Velocity of the flowing blood
C. Larmor frequency of arterial versus venous blood
D. Rate of gadolinium contrast injection
E. Timing of gadolinium contrast injection
F. A, D and E. Answer:Velocity of the flowing blood
◉In a Fast Spin Echo (FSE) sequence, acquired with a short echo time (TE), yielding T1 or PD
weighted images, blurring can be reduced by:
A. Increasing the FOV
B. Increasing NEX
C. Using shorter ETL
D. Using longer ETL
E. Increasing phase encodings. Answer:Using shorter ETL
◉Calculate the dose of contrast (0.1mmol/kg) that should be administered to a patient
weighing 176 lbs with normal kidney function in a routine MR examination.
, A. 6mL
B. 8mL
C. 12mL
D. 16mL
E. 18mL. Answer:16mL
◉_______ is when only half the views of k-space are filled in the frequency axis.
A. Anti aliasing
B. Parallel imaging
C. Half fourier
D. Partial or fractional echo
E. 1/2 TE (TAU). Answer:Partial or fractional echo
◉Fat has a _______ T1 relaxation time and a ________ T2 relaxation time.
A. Long; long
B. Short; short
C. Short; long
D. Long; short. Answer:Short; short
◉Increasing the flip angle:
A. Doubles the SNR proportional to the angle increased
B. Reduces SNR
C. Increases SNR up to the Ernst angle
D. Does not affect SNR. Answer:Increases SNR up to the Ernst angle
◉Which of the following parameter adjustments will SHORTEN scan time in an MR pulse
sequence?
I. Decrease TR
II. Increase TR
III. Increase ETL
IV. Decrease ETL
V. Decrease NEX
