ASMIRT MRI ACCREDITATION EXAM – VERSION 2
LATEST 2026 UPDATE 100 QUESTIONS AND
DETAILED VERIFIED ANSWERS FROM ACTUAL
EXAMS TEST GRADE A+
Question 1
What is the primary purpose of MRI gradient coils?
A. Generate the main magnetic field
B. Improve signal-to-noise ratio
C. Spatially encode the MR signal
D. Reduce patient motion
Answer: C. Spatially encode the MR signal
Rationale: Gradient coils create linear magnetic field variations that allow spatial
localization of the MR signal in x, y, and z directions.
Question 2
Which tissue produces the highest signal on T1-weighted MRI?
A. Cerebrospinal fluid
B. Cortical bone
C. Fat
D. Air
Answer: C. Fat
Rationale: Fat has short T1 relaxation time, resulting in high signal intensity on T1-
weighted images.
,Question 3
What safety hazard is associated with the static magnetic field?
A. Acoustic noise
B. Projectile effect
C. RF heating
D. Gradient switching nerve stimulation
Answer: B. Projectile effect
Rationale: Ferromagnetic objects can become dangerous projectiles in the static
magnetic field.
Question 4
What is the primary function of a RF coil?
A. Generate static field
B. Transmit and/or receive MR signal
C. Reduce scan time
D. Improve patient comfort
Answer: B. Transmit and/or receive MR signal
Rationale: RF coils excite hydrogen protons and receive emitted signals.
Question 5
Which parameter most influences T1 weighting?
A. TE
B. TR
C. Flip angle
D. Field of view
,Answer: B. TR
Rationale: Repetition time (TR) primarily determines T1 contrast.
Question 6
Which of the following is a contraindication to MRI?
A. Pacemaker (non-MR conditional)
B. Metallic dental fillings
C. Prosthetic hip
D. Tattoos
Answer: A. Pacemaker (non-MR conditional)
Rationale: Non-MR conditional pacemakers can malfunction or heat in MRI.
Question 7
What is the role of T2 relaxation?
A. Longitudinal recovery
B. Transverse decay
C. Proton alignment
D. Signal amplification
Answer: B. Transverse decay
Rationale: T2 describes loss of phase coherence in the transverse plane.
Question 8
Which sequence is most sensitive to fluid detection?
A. T1-weighted
B. T2-weighted
C. Gradient echo
D. Proton density
, Answer: B. T2-weighted
Rationale: Fluids appear bright on T2-weighted images due to long T2 relaxation.
Question 9
What causes chemical shift artifact?
A. Gradient failure
B. Different resonance frequencies of fat and water
C. Patient motion
D. RF interference
Answer: B. Different resonance frequencies of fat and water
Rationale: Fat and water precess at slightly different frequencies, causing
misregistration.
Question 10
What is SAR in MRI?
A. Signal Acquisition Rate
B. Specific Absorption Rate
C. Spatial Alignment Ratio
D. Slice Acquisition Resolution
Answer: B. Specific Absorption Rate
Rationale: SAR measures RF energy absorbed by the body, linked to heating risk.
Question 11
Which plane divides the body into superior and inferior parts?
A. Coronal
B. Sagittal
LATEST 2026 UPDATE 100 QUESTIONS AND
DETAILED VERIFIED ANSWERS FROM ACTUAL
EXAMS TEST GRADE A+
Question 1
What is the primary purpose of MRI gradient coils?
A. Generate the main magnetic field
B. Improve signal-to-noise ratio
C. Spatially encode the MR signal
D. Reduce patient motion
Answer: C. Spatially encode the MR signal
Rationale: Gradient coils create linear magnetic field variations that allow spatial
localization of the MR signal in x, y, and z directions.
Question 2
Which tissue produces the highest signal on T1-weighted MRI?
A. Cerebrospinal fluid
B. Cortical bone
C. Fat
D. Air
Answer: C. Fat
Rationale: Fat has short T1 relaxation time, resulting in high signal intensity on T1-
weighted images.
,Question 3
What safety hazard is associated with the static magnetic field?
A. Acoustic noise
B. Projectile effect
C. RF heating
D. Gradient switching nerve stimulation
Answer: B. Projectile effect
Rationale: Ferromagnetic objects can become dangerous projectiles in the static
magnetic field.
Question 4
What is the primary function of a RF coil?
A. Generate static field
B. Transmit and/or receive MR signal
C. Reduce scan time
D. Improve patient comfort
Answer: B. Transmit and/or receive MR signal
Rationale: RF coils excite hydrogen protons and receive emitted signals.
Question 5
Which parameter most influences T1 weighting?
A. TE
B. TR
C. Flip angle
D. Field of view
,Answer: B. TR
Rationale: Repetition time (TR) primarily determines T1 contrast.
Question 6
Which of the following is a contraindication to MRI?
A. Pacemaker (non-MR conditional)
B. Metallic dental fillings
C. Prosthetic hip
D. Tattoos
Answer: A. Pacemaker (non-MR conditional)
Rationale: Non-MR conditional pacemakers can malfunction or heat in MRI.
Question 7
What is the role of T2 relaxation?
A. Longitudinal recovery
B. Transverse decay
C. Proton alignment
D. Signal amplification
Answer: B. Transverse decay
Rationale: T2 describes loss of phase coherence in the transverse plane.
Question 8
Which sequence is most sensitive to fluid detection?
A. T1-weighted
B. T2-weighted
C. Gradient echo
D. Proton density
, Answer: B. T2-weighted
Rationale: Fluids appear bright on T2-weighted images due to long T2 relaxation.
Question 9
What causes chemical shift artifact?
A. Gradient failure
B. Different resonance frequencies of fat and water
C. Patient motion
D. RF interference
Answer: B. Different resonance frequencies of fat and water
Rationale: Fat and water precess at slightly different frequencies, causing
misregistration.
Question 10
What is SAR in MRI?
A. Signal Acquisition Rate
B. Specific Absorption Rate
C. Spatial Alignment Ratio
D. Slice Acquisition Resolution
Answer: B. Specific Absorption Rate
Rationale: SAR measures RF energy absorbed by the body, linked to heating risk.
Question 11
Which plane divides the body into superior and inferior parts?
A. Coronal
B. Sagittal
