ARRT REGISTRY CORE EXAM 2026 MAIN QUESTIONS AND
ANSWERS SURE A+
✔✔The 2003 FDA revision on RF absorption limits the absorption to ______________
for the head.
A. 2.0W/kg for 5 minutes
B. 3.0W/kg for 5 minutes
C. 3.0W/kg for 10 minutes
D. 4.0W/kg for 10 minutes
E. 4.0W/kg for 15 minutes - ✔✔3.0W/kg for 10 minutes
✔✔Short TAU inversion recovery (STIR) sequences are typically used for the evaluation
of all the following EXCEPT:
A. Compression fracture
B. Fat suppression
C. Fluid (CSF)
D. Lesions within retro-orbital fat
E. Musculoskeletal contusions - ✔✔Fluid (CSF)
✔✔Which of the following combinations of flip angle (FA) and TR would produce a T2
weighted gradient echo?
A. 45 TR; 30º flip angle
B. 45 TR; 90º flip angle
C. 450 TR; 30º flip angle
D. 450 TR; 90º flip angle - ✔✔450 TR; 30º flip angle
✔✔The common carotid artery bifurcates into the internal and external carotid artery at
the level of the:
A. C1-2 disc space
B. C3-4 disc space
C. C5-6 disc space
D. C7-T1 disc space - ✔✔C3-4 disc space
✔✔The final result in a perfusion study is:
A. A spectrum of specific detected metabolites
B. MIPped images of vascular anatomy
C. Calculated MPR images of a 3D data set
D. A set of calculated images which indicate various flow characteristics - ✔✔A set of
calculated images which indicate various flow characteristics
✔✔A remedy for a Gibbs truncation artifact would be:
A. Increase the field of view
B. Reduce the number of phase encodings
C. Increase the number of phase encodings
,D. Decrease the TE - ✔✔Increase the number of phase encodings
✔✔All of the following comprise the biliary tree EXCEPT:
A. Left hepatic duct
B. Right hepatic duct
C. Common bile duct
D. Splenic duct
E. Pancreatic duct - ✔✔Splenic duct
✔✔Collecting the low frequency (high amplitude signal) data points in k-space at the
start of the scan (in a spiral fashion) is known as:
A. Centric
B. Linear
C. Reverse centric
D. Elliptic centric - ✔✔Elliptic centric
✔✔Calculate the pixel area for the following sequence: TR 4000, TE 120, FOV 36cm,
408 x 512 matrix, 2 NEX, ETL 12.
A. 0.62 mm2
B. 0.70 mm2
C. 0.76 mm2
D. 0.88 mm2
E. 1.58 mm2 - ✔✔0.62 mm2
✔✔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 - ✔✔Using shorter ETL
✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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
ANSWERS SURE A+
✔✔The 2003 FDA revision on RF absorption limits the absorption to ______________
for the head.
A. 2.0W/kg for 5 minutes
B. 3.0W/kg for 5 minutes
C. 3.0W/kg for 10 minutes
D. 4.0W/kg for 10 minutes
E. 4.0W/kg for 15 minutes - ✔✔3.0W/kg for 10 minutes
✔✔Short TAU inversion recovery (STIR) sequences are typically used for the evaluation
of all the following EXCEPT:
A. Compression fracture
B. Fat suppression
C. Fluid (CSF)
D. Lesions within retro-orbital fat
E. Musculoskeletal contusions - ✔✔Fluid (CSF)
✔✔Which of the following combinations of flip angle (FA) and TR would produce a T2
weighted gradient echo?
A. 45 TR; 30º flip angle
B. 45 TR; 90º flip angle
C. 450 TR; 30º flip angle
D. 450 TR; 90º flip angle - ✔✔450 TR; 30º flip angle
✔✔The common carotid artery bifurcates into the internal and external carotid artery at
the level of the:
A. C1-2 disc space
B. C3-4 disc space
C. C5-6 disc space
D. C7-T1 disc space - ✔✔C3-4 disc space
✔✔The final result in a perfusion study is:
A. A spectrum of specific detected metabolites
B. MIPped images of vascular anatomy
C. Calculated MPR images of a 3D data set
D. A set of calculated images which indicate various flow characteristics - ✔✔A set of
calculated images which indicate various flow characteristics
✔✔A remedy for a Gibbs truncation artifact would be:
A. Increase the field of view
B. Reduce the number of phase encodings
C. Increase the number of phase encodings
,D. Decrease the TE - ✔✔Increase the number of phase encodings
✔✔All of the following comprise the biliary tree EXCEPT:
A. Left hepatic duct
B. Right hepatic duct
C. Common bile duct
D. Splenic duct
E. Pancreatic duct - ✔✔Splenic duct
✔✔Collecting the low frequency (high amplitude signal) data points in k-space at the
start of the scan (in a spiral fashion) is known as:
A. Centric
B. Linear
C. Reverse centric
D. Elliptic centric - ✔✔Elliptic centric
✔✔Calculate the pixel area for the following sequence: TR 4000, TE 120, FOV 36cm,
408 x 512 matrix, 2 NEX, ETL 12.
A. 0.62 mm2
B. 0.70 mm2
C. 0.76 mm2
D. 0.88 mm2
E. 1.58 mm2 - ✔✔0.62 mm2
✔✔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 - ✔✔Using shorter ETL
✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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 - ✔✔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
