MAGNETIC RESONANCE SAFETY EXPERT (MRSE) NEWLY UPDATED COLLECTION
OF EXAM QUESTIONS AND VERIFIED ANSWERS DESIGNED TO GUARANTEE YOUR
SUCCESS ON THE LATEST TEST VERSION
1. What is the primary magnetic field strength unit used in MRI?
o A) Gauss
o B) Tesla
o C) Weber
o D) Maxwell
o Answer: B) Tesla
2. At what field strength does the FDA classify an MRI system as
"significant risk"?
o A) 1.5 Tesla
o B) 2 Tesla
o C) 4 Tesla
o D) 8 Tesla
o Answer: C) 4 Tesla
3. What does SAR stand for in MRI safety?
o A) Specific Absorption Rate
o B) Standard Absorption Ratio
o C) Safe Absorption Range
o D) Systematic Absorption Reading
o Answer: A) Specific Absorption Rate
4. The 5 Gauss line represents:
, o A) The scanner bore entrance
o B) The boundary of the controlled access area
o C) The edge of the fringe field
o D) The maximum safe exposure limit
o Answer: B) The boundary of the controlled access area
5. What is the typical static field strength of a clinical MRI scanner?
o A) 0.5-3 Tesla
o B) 5-7 Tesla
o C) 10-15 Tesla
o D) 20-25 Tesla
o Answer: A) 0.5-3 Tesla
6. Which gradient field causes peripheral nerve stimulation?
o A) Static magnetic field
o B) Radiofrequency field
o C) Time-varying gradient field
o D) Fringe field
o Answer: C) Time-varying gradient field
7. The RF field in MRI operates at what frequency range?
o A) Kilohertz
o B) Megahertz
o C) Gigahertz
o D) Terahertz
o Answer: B) Megahertz
8. What does dB/dt represent?
o A) Decibel per Tesla
o B) Rate of change of magnetic field
o C) Distance from bore to Tesla
, o D) Duration of baseline test
o Answer: B) Rate of change of magnetic field
9. The Larmor frequency is directly proportional to:
o A) Patient weight
o B) Scan time
o C) Magnetic field strength
o D) Room temperature
o Answer: C) Magnetic field strength
10.What is the unit of measurement for SAR?
o A) Tesla/second
o B) Watts/kilogram
o C) Joules/meter
o D) Gauss/minute
o Answer: B) Watts/kilogram
11.The ACR classifies MRI zones into how many levels?
o A) 2
o B) 3
o C) 4
o D) 5
o Answer: C) 4
12.Zone III is defined as:
o A) General public area
o B) Area between public and controlled access
o C) The MR scanner room
o D) Equipment storage area
o Answer: B) Area between public and controlled access
13.Which type of magnet requires cryogens?
, o A) Permanent magnet
o B) Resistive magnet
o C) Superconducting magnet
o D) Hybrid magnet
o Answer: C) Superconducting magnet
14.What is the primary cryogen used in MRI systems?
o A) Nitrogen
o B) Helium
o C) Oxygen
o D) Argon
o Answer: B) Helium
15.A quench refers to:
o A) Turning off the scanner
o B) Sudden loss of superconductivity
o C) Cleaning the magnet
o D) Patient cooling system
o Answer: B) Sudden loss of superconductivity
16.What percentage of oxygen concentration indicates danger after a
quench?
o A) Below 25%
o B) Below 21%
o C) Below 19.5%
o D) Below 15%
o Answer: C) Below 19.5%
17.The projectile effect is primarily due to:
o A) RF heating
o B) Gradient switching
o C) Static magnetic field attraction
OF EXAM QUESTIONS AND VERIFIED ANSWERS DESIGNED TO GUARANTEE YOUR
SUCCESS ON THE LATEST TEST VERSION
1. What is the primary magnetic field strength unit used in MRI?
o A) Gauss
o B) Tesla
o C) Weber
o D) Maxwell
o Answer: B) Tesla
2. At what field strength does the FDA classify an MRI system as
"significant risk"?
o A) 1.5 Tesla
o B) 2 Tesla
o C) 4 Tesla
o D) 8 Tesla
o Answer: C) 4 Tesla
3. What does SAR stand for in MRI safety?
o A) Specific Absorption Rate
o B) Standard Absorption Ratio
o C) Safe Absorption Range
o D) Systematic Absorption Reading
o Answer: A) Specific Absorption Rate
4. The 5 Gauss line represents:
, o A) The scanner bore entrance
o B) The boundary of the controlled access area
o C) The edge of the fringe field
o D) The maximum safe exposure limit
o Answer: B) The boundary of the controlled access area
5. What is the typical static field strength of a clinical MRI scanner?
o A) 0.5-3 Tesla
o B) 5-7 Tesla
o C) 10-15 Tesla
o D) 20-25 Tesla
o Answer: A) 0.5-3 Tesla
6. Which gradient field causes peripheral nerve stimulation?
o A) Static magnetic field
o B) Radiofrequency field
o C) Time-varying gradient field
o D) Fringe field
o Answer: C) Time-varying gradient field
7. The RF field in MRI operates at what frequency range?
o A) Kilohertz
o B) Megahertz
o C) Gigahertz
o D) Terahertz
o Answer: B) Megahertz
8. What does dB/dt represent?
o A) Decibel per Tesla
o B) Rate of change of magnetic field
o C) Distance from bore to Tesla
, o D) Duration of baseline test
o Answer: B) Rate of change of magnetic field
9. The Larmor frequency is directly proportional to:
o A) Patient weight
o B) Scan time
o C) Magnetic field strength
o D) Room temperature
o Answer: C) Magnetic field strength
10.What is the unit of measurement for SAR?
o A) Tesla/second
o B) Watts/kilogram
o C) Joules/meter
o D) Gauss/minute
o Answer: B) Watts/kilogram
11.The ACR classifies MRI zones into how many levels?
o A) 2
o B) 3
o C) 4
o D) 5
o Answer: C) 4
12.Zone III is defined as:
o A) General public area
o B) Area between public and controlled access
o C) The MR scanner room
o D) Equipment storage area
o Answer: B) Area between public and controlled access
13.Which type of magnet requires cryogens?
, o A) Permanent magnet
o B) Resistive magnet
o C) Superconducting magnet
o D) Hybrid magnet
o Answer: C) Superconducting magnet
14.What is the primary cryogen used in MRI systems?
o A) Nitrogen
o B) Helium
o C) Oxygen
o D) Argon
o Answer: B) Helium
15.A quench refers to:
o A) Turning off the scanner
o B) Sudden loss of superconductivity
o C) Cleaning the magnet
o D) Patient cooling system
o Answer: B) Sudden loss of superconductivity
16.What percentage of oxygen concentration indicates danger after a
quench?
o A) Below 25%
o B) Below 21%
o C) Below 19.5%
o D) Below 15%
o Answer: C) Below 19.5%
17.The projectile effect is primarily due to:
o A) RF heating
o B) Gradient switching
o C) Static magnetic field attraction
