Page 1 of 67
CAMRT MRI EXAM ALL 300 QUESTIONS AND
VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
QUESTION: While performing a temporal mandibular joint (TMJ) scan, the MR technologist
recognizes a magnetic susceptibility artifact from a dental filling. How should the scan
parameters be adjusted to minimize this?
a) decrease voxel size and decrease TE
b) decrease voxel size and increase TE
c) decrease ETL and increase bandwidth
d) decrease ETL and decrease bandwidth - ANSWER-a) decrease voxel size and decrease TE
The magnetic susceptibility artifact will be minimized with small voxel size and short TE. A
longer TE allows for more dephasing between tissues with susceptibility differences.
QUESTION: A patient indicates on the MR screening form that they had a heart valve prosthesis
inserted 8 weeks ago, which was after their last MR exam. What should the MR technologist
do?
1
, Page 2 of 67
a) obtain the surgical report and review the information with established MR safety
documentation
b) send the patient home because prosthesis heart valves are contraindications for MR
procedures
c) send this patient for a chest x-ray to determine if the prosthetic heart valve is metallic
d) cancel the MR exam until the radiologist can review for safety - ANSWER-a) obtain the
surgical report and review the information with established MR safety documentation
Never assume MRI compatibility or safety of a device unless it is clearly documented in writing.
QUESTION: What pulse sequence should the MR technologist employ to obtain dynamic
information of the pelvis?
a) fast GRE T1W imaging pre- and post-gadolinium injection
b) T2W FSE imaging pre- and post-gadolinium injection
c) T1W SE imaging during injection to provide perfusion information
d) fast 3D GRE T1W imaging during injection to provide perfusion information - ANSWER-d) fast
3D GRE T1W imaging during injection to provide perfusion information
This will provide perfusion information in vascular pelvic structures
2
, Page 3 of 67
QUESTION: How can cross-excitation be corrected?
a) by using interleave slice ordering
b) by using sequential slice ordering
c) by decreasing SLT by 30%
d) by using a phased array coil - ANSWER-a) by using interleave slice ordering
Nuclei in slices adjacent to the RF excitation pulse may become excited because RF pulses are
not perfectly square. Using interleave spreads out k-space filling.
An 89 yr old patient arrives to the MRI department for a routine knee scan. They complete the
screening form indicating that they have never had any type of surgery. While helping the
patient into a hospital gown, the MR technologist notices a large straight scar down the centre
of the patient's chest. How should the MR technologist proceed?
a) obtain consent from next of kin to proceed with exam
b) assess the patient cognitive function
c) make note of the scar on the screening form
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, Page 4 of 67
d) ask patient for more detail about the scar - ANSWER-d) ask patient for more detail about the
scar
The MR technologist needs to get more information regarding the scar before making an
informed decision on whether to proceed with the MRI.
QUESTION: A T1 coronal image of the abdomen is described as having a dark outline around all
the organs. Which artifact is this?
a) Moire fringe
b) chemical shift
c) truncation
d) motion - ANSWER-b) chemical shift
This occurs in GRE sequences when fat and water are imaged at a TE when out of phase with
each other. It is demonstrated as a dark outline around the organs.
QUESTION: What is the best technique to achieve T2 FS when imaging the shoulder of a patient
who has a history of shoulder replacement?
a) Chemical FS
4
CAMRT MRI EXAM ALL 300 QUESTIONS AND
VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
QUESTION: While performing a temporal mandibular joint (TMJ) scan, the MR technologist
recognizes a magnetic susceptibility artifact from a dental filling. How should the scan
parameters be adjusted to minimize this?
a) decrease voxel size and decrease TE
b) decrease voxel size and increase TE
c) decrease ETL and increase bandwidth
d) decrease ETL and decrease bandwidth - ANSWER-a) decrease voxel size and decrease TE
The magnetic susceptibility artifact will be minimized with small voxel size and short TE. A
longer TE allows for more dephasing between tissues with susceptibility differences.
QUESTION: A patient indicates on the MR screening form that they had a heart valve prosthesis
inserted 8 weeks ago, which was after their last MR exam. What should the MR technologist
do?
1
, Page 2 of 67
a) obtain the surgical report and review the information with established MR safety
documentation
b) send the patient home because prosthesis heart valves are contraindications for MR
procedures
c) send this patient for a chest x-ray to determine if the prosthetic heart valve is metallic
d) cancel the MR exam until the radiologist can review for safety - ANSWER-a) obtain the
surgical report and review the information with established MR safety documentation
Never assume MRI compatibility or safety of a device unless it is clearly documented in writing.
QUESTION: What pulse sequence should the MR technologist employ to obtain dynamic
information of the pelvis?
a) fast GRE T1W imaging pre- and post-gadolinium injection
b) T2W FSE imaging pre- and post-gadolinium injection
c) T1W SE imaging during injection to provide perfusion information
d) fast 3D GRE T1W imaging during injection to provide perfusion information - ANSWER-d) fast
3D GRE T1W imaging during injection to provide perfusion information
This will provide perfusion information in vascular pelvic structures
2
, Page 3 of 67
QUESTION: How can cross-excitation be corrected?
a) by using interleave slice ordering
b) by using sequential slice ordering
c) by decreasing SLT by 30%
d) by using a phased array coil - ANSWER-a) by using interleave slice ordering
Nuclei in slices adjacent to the RF excitation pulse may become excited because RF pulses are
not perfectly square. Using interleave spreads out k-space filling.
An 89 yr old patient arrives to the MRI department for a routine knee scan. They complete the
screening form indicating that they have never had any type of surgery. While helping the
patient into a hospital gown, the MR technologist notices a large straight scar down the centre
of the patient's chest. How should the MR technologist proceed?
a) obtain consent from next of kin to proceed with exam
b) assess the patient cognitive function
c) make note of the scar on the screening form
3
, Page 4 of 67
d) ask patient for more detail about the scar - ANSWER-d) ask patient for more detail about the
scar
The MR technologist needs to get more information regarding the scar before making an
informed decision on whether to proceed with the MRI.
QUESTION: A T1 coronal image of the abdomen is described as having a dark outline around all
the organs. Which artifact is this?
a) Moire fringe
b) chemical shift
c) truncation
d) motion - ANSWER-b) chemical shift
This occurs in GRE sequences when fat and water are imaged at a TE when out of phase with
each other. It is demonstrated as a dark outline around the organs.
QUESTION: What is the best technique to achieve T2 FS when imaging the shoulder of a patient
who has a history of shoulder replacement?
a) Chemical FS
4
