MRI ARMRIT EXAM QUESTIONS VERSION 2
LATEST 2026 UPDATE 100 QUESTIONS AND
DETAILED VERIFIED ANSWERS FROM ACTUAL
EXAMS TEST GRADE A+
1. What is the primary function of the gradient coils in MRI?
A. Generate the main magnetic field
B. Improve signal-to-noise ratio
C. Spatially encode the MR signal
D. Cool the magnet
Rationale: Gradient coils create linear variations in the magnetic field used for slice
selection, frequency encoding, and phase encoding.
Answer: C. Spatially encode the MR signal
2. Which tissue appears brightest on T1-weighted images?
A. Cerebrospinal fluid
B. Fat
C. Cortical bone
D. Air
Rationale: Fat has a short T1 relaxation time, producing high signal intensity on
T1-weighted images.
Answer: B. Fat
3. What is the main purpose of the RF pulse in MRI?
,A. Align protons with the main field
B. Excite hydrogen protons
C. Cool the magnet
D. Increase field strength
Rationale: The RF pulse tips net magnetization away from equilibrium, allowing
signal generation.
Answer: B. Excite hydrogen protons
4. What is T2 relaxation time?
A. Time for longitudinal magnetization recovery
B. Time for transverse magnetization decay
C. Time for proton excitation
D. Time for gradient switching
Rationale: T2 measures loss of phase coherence in the transverse plane.
Answer: B. Time for transverse magnetization decay
5. Which structure produces the highest MRI signal on T2-weighted images?
A. Cortical bone
B. Air
C. Cerebrospinal fluid
D. Muscle
Rationale: Fluids have long T2 relaxation times and appear bright on T2-weighted
images.
Answer: C. Cerebrospinal fluid
6. What does TR stand for in MRI?
A. Tissue recovery
B. Transmission rate
,C. Repetition time
D. Relaxation ratio
Rationale: TR is the time between successive pulse sequences.
Answer: C. Repetition time
7. What is the primary safety concern with MRI?
A. Radiation exposure
B. Magnetic field hazards
C. Sound waves
D. Heat lamps
Rationale: MRI uses a strong magnetic field that can attract ferromagnetic
objects.
Answer: B. Magnetic field hazards
8. Which metal is NOT safe in MRI environments?
A. Titanium
B. Aluminum
C. Ferromagnetic steel
D. Copper
Rationale: Ferromagnetic materials can become dangerous projectiles in MRI
rooms.
Answer: C. Ferromagnetic steel
9. What is the Larmor equation used for?
A. Calculating tissue density
B. Determining resonance frequency
C. Measuring TR
D. Adjusting slice thickness
, Rationale: Larmor frequency defines proton precession frequency in a magnetic
field.
Answer: B. Determining resonance frequency
10. What is slice selection achieved by?
A. Gradient field + RF pulse
B. Only RF pulse
C. Only main magnet
D. Patient positioning
Rationale: Slice selection gradient determines spatial location of excitation.
Answer: A. Gradient field + RF pulse
11. Which parameter controls image contrast most in T1-weighted imaging?
A. TE
B. TR
C. Flip angle only
D. Field of view
Rationale: Short TR emphasizes T1 differences between tissues.
Answer: B. TR
12. What is TE in MRI?
A. Total energy
B. Echo time
C. Tissue excitation
D. Transmission efficiency
Rationale: TE is the time from RF pulse to signal peak.
Answer: B. Echo time
LATEST 2026 UPDATE 100 QUESTIONS AND
DETAILED VERIFIED ANSWERS FROM ACTUAL
EXAMS TEST GRADE A+
1. What is the primary function of the gradient coils in MRI?
A. Generate the main magnetic field
B. Improve signal-to-noise ratio
C. Spatially encode the MR signal
D. Cool the magnet
Rationale: Gradient coils create linear variations in the magnetic field used for slice
selection, frequency encoding, and phase encoding.
Answer: C. Spatially encode the MR signal
2. Which tissue appears brightest on T1-weighted images?
A. Cerebrospinal fluid
B. Fat
C. Cortical bone
D. Air
Rationale: Fat has a short T1 relaxation time, producing high signal intensity on
T1-weighted images.
Answer: B. Fat
3. What is the main purpose of the RF pulse in MRI?
,A. Align protons with the main field
B. Excite hydrogen protons
C. Cool the magnet
D. Increase field strength
Rationale: The RF pulse tips net magnetization away from equilibrium, allowing
signal generation.
Answer: B. Excite hydrogen protons
4. What is T2 relaxation time?
A. Time for longitudinal magnetization recovery
B. Time for transverse magnetization decay
C. Time for proton excitation
D. Time for gradient switching
Rationale: T2 measures loss of phase coherence in the transverse plane.
Answer: B. Time for transverse magnetization decay
5. Which structure produces the highest MRI signal on T2-weighted images?
A. Cortical bone
B. Air
C. Cerebrospinal fluid
D. Muscle
Rationale: Fluids have long T2 relaxation times and appear bright on T2-weighted
images.
Answer: C. Cerebrospinal fluid
6. What does TR stand for in MRI?
A. Tissue recovery
B. Transmission rate
,C. Repetition time
D. Relaxation ratio
Rationale: TR is the time between successive pulse sequences.
Answer: C. Repetition time
7. What is the primary safety concern with MRI?
A. Radiation exposure
B. Magnetic field hazards
C. Sound waves
D. Heat lamps
Rationale: MRI uses a strong magnetic field that can attract ferromagnetic
objects.
Answer: B. Magnetic field hazards
8. Which metal is NOT safe in MRI environments?
A. Titanium
B. Aluminum
C. Ferromagnetic steel
D. Copper
Rationale: Ferromagnetic materials can become dangerous projectiles in MRI
rooms.
Answer: C. Ferromagnetic steel
9. What is the Larmor equation used for?
A. Calculating tissue density
B. Determining resonance frequency
C. Measuring TR
D. Adjusting slice thickness
, Rationale: Larmor frequency defines proton precession frequency in a magnetic
field.
Answer: B. Determining resonance frequency
10. What is slice selection achieved by?
A. Gradient field + RF pulse
B. Only RF pulse
C. Only main magnet
D. Patient positioning
Rationale: Slice selection gradient determines spatial location of excitation.
Answer: A. Gradient field + RF pulse
11. Which parameter controls image contrast most in T1-weighted imaging?
A. TE
B. TR
C. Flip angle only
D. Field of view
Rationale: Short TR emphasizes T1 differences between tissues.
Answer: B. TR
12. What is TE in MRI?
A. Total energy
B. Echo time
C. Tissue excitation
D. Transmission efficiency
Rationale: TE is the time from RF pulse to signal peak.
Answer: B. Echo time
