1|Page
MAGNETIC RESONANCE SAFETY EXPERT
(MRSE) CERTIFICATION EXAM WITH
VERIFIED SOLUTIONS
Question 1
Which term best describes the magnetic field strength at the center of an MR
scanner?
A. Gradient field
B. Radiofrequency field
C. Static magnetic field (B₀)
D. Eddy current field
Correct Answer: C
Rationale: The static magnetic field, denoted B₀, is the uniform, high-strength
field generated by the main magnet and is present continuously during scanning.
This is the primary field that aligns hydrogen protons and is measured in Tesla (T)
or Gauss (G) .
Question 2
What is the conversion between Tesla and Gauss?
,2|Page
A. 1 T = 100 G
B. 1 T = 1,000 G
C. 1 T = 10,000 G
D. 1 T = 100,000 G
Correct Answer: C
Rationale: 1 Tesla equals 10,000 Gauss. This conversion is essential for
understanding magnetic field strength measurements, as the 5 Gauss line is a
critical safety boundary .
Question 3
What is the resonance frequency at 1.5 Tesla?
A. 21 MHz
B. 42 MHz
C. 64 MHz
D. 128 MHz
Correct Answer: C
Rationale: At 1.5T, hydrogen protons precess at approximately 64 MHz (1.5T ×
42.58 MHz/T = 63.87 MHz). This frequency determines the RF energy required to
achieve resonance .
, 3|Page
Question 4
What is the resonance frequency at 3.0 Tesla?
A. 42 MHz
B. 64 MHz
C. 128 MHz
D. 256 MHz
Correct Answer: C
Rationale: At 3.0T, the resonance frequency is approximately 128 MHz (3.0T ×
42.58 MHz/T). Higher field strengths require higher RF frequencies, which has
implications for RF heating and energy deposition .
Question 5
Which term best describes the magnetic field that extends outside the MR unit?
A. Spatial gradient
B. Fringe field
C. Gradient field
D. RF field
Correct Answer: B
MAGNETIC RESONANCE SAFETY EXPERT
(MRSE) CERTIFICATION EXAM WITH
VERIFIED SOLUTIONS
Question 1
Which term best describes the magnetic field strength at the center of an MR
scanner?
A. Gradient field
B. Radiofrequency field
C. Static magnetic field (B₀)
D. Eddy current field
Correct Answer: C
Rationale: The static magnetic field, denoted B₀, is the uniform, high-strength
field generated by the main magnet and is present continuously during scanning.
This is the primary field that aligns hydrogen protons and is measured in Tesla (T)
or Gauss (G) .
Question 2
What is the conversion between Tesla and Gauss?
,2|Page
A. 1 T = 100 G
B. 1 T = 1,000 G
C. 1 T = 10,000 G
D. 1 T = 100,000 G
Correct Answer: C
Rationale: 1 Tesla equals 10,000 Gauss. This conversion is essential for
understanding magnetic field strength measurements, as the 5 Gauss line is a
critical safety boundary .
Question 3
What is the resonance frequency at 1.5 Tesla?
A. 21 MHz
B. 42 MHz
C. 64 MHz
D. 128 MHz
Correct Answer: C
Rationale: At 1.5T, hydrogen protons precess at approximately 64 MHz (1.5T ×
42.58 MHz/T = 63.87 MHz). This frequency determines the RF energy required to
achieve resonance .
, 3|Page
Question 4
What is the resonance frequency at 3.0 Tesla?
A. 42 MHz
B. 64 MHz
C. 128 MHz
D. 256 MHz
Correct Answer: C
Rationale: At 3.0T, the resonance frequency is approximately 128 MHz (3.0T ×
42.58 MHz/T). Higher field strengths require higher RF frequencies, which has
implications for RF heating and energy deposition .
Question 5
Which term best describes the magnetic field that extends outside the MR unit?
A. Spatial gradient
B. Fringe field
C. Gradient field
D. RF field
Correct Answer: B
