MRSO EXAM MARK STUDY GUIDE 2026 COMPLETE
QUESTIONS WITH CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <RECENT VERSION>
Section 1: MR Safety Principles & Governance (Questions 1-25)
1. What is the primary responsibility of the MR Safety Officer (MRSO)?
A) Operating the MR scanner
B) Ensuring patient throughput
C) Establishing and enforcing MR safety policies
D) Performing routine maintenance on the magnet
Explanation: The MRSO is an administrative and supervisory role responsible for
the overall MR safety program, including developing, implementing, and enforcing
policies and procedures to ensure a safe environment for patients, staff, and
visitors.
2. According to the ACR, what is the minimum recommended level of MR
personnel required to be in the MR suite during a routine patient scan?
A) One Level 1 MR Personnel
B) One Level 1 and one Level 2 MR Personnel
C) Two Level 2 MR Personnel
D) Only the MR technologist
Explanation: The ACR recommends that at least two individuals with MR
personnel qualifications be present during a routine patient examination. One
must be Level 2 MR Personnel (e.g., the MR technologist), and the other must be
at least Level 1 MR Personnel (e.g., a nurse or aide).
3. The term "MR Conditional" indicates that an item:
A) Is safe in all MR environments
B) Poses no known hazards in any MR environment
C) Has been demonstrated to pose no known hazards in a specified MR
,environment with specified conditions of use
D) Is unsafe in any MR environment
Explanation: "MR Conditional" is an ASTM labeling term meaning the device or
object has been tested and is safe to use under very specific conditions (e.g., static
field strength, spatial gradient, RF fields, SAR limits). These conditions must be
strictly adhered to.
4. The Quench button should be activated:
A) To cool down the magnet after a long day
B) Only in a life-threatening or catastrophic emergency that cannot be resolved by
other means
C) Whenever a ferromagnetic object is projectile into the bore
D) Routinely to test the system
Explanation: A quench is a serious event that rapidly boils off cryogens and can
cause significant damage and cost. It should only be used as a last resort in a
situation where a person's life is in immediate danger and removing the threat is
impossible without quenching (e.g., a patient is pinned by a large object and is
coding).
5. The four MR Safety Zones, as defined by the ACR, are:
A) Red, Yellow, Green, Blue
B) Zone I, Zone II, Zone III, Zone IV
C) Public, Reception, Scan Room, Control Room
D) Unrestricted, Semi-Restricted, Restricted, Magnet
Explanation: The standard ACR zoning is Zone I (public, uncontrolled access), Zone
II (interface between uncontrolled and strictly controlled areas), Zone III (area
where unscreened individuals could be harmed), and Zone IV (the magnet room
itself).
6. Who is responsible for physically screening all individuals before they enter
Zone III?
A) The MRSO
B) The referring physician
,C) The MR Medical Director
D) Designated, trained MR Safety–Screened Personnel
Explanation: A trained individual (Level 1 or 2) must perform a physical screening
(e.g., using a ferromagnetic detection system, pat-down, questionnaire) on every
person before they are allowed to enter Zone III.
7. The primary source for establishing the MR safety program is the:
A) MR technologist's experience
B) ACR Guidance Document on MR Safe Practices
C) Scanner manufacturer's service manual
D) Hospital administrator's policy
Explanation: The ACR Guidance Document on MR Safe Practices is the most
comprehensive and widely accepted standard for establishing and maintaining an
MR safety program in the clinical setting.
8. A "Gauss line" demarcates:
A) The 5-Gauss line, separating areas where the static magnetic field is strong
enough to be hazardous to certain individuals and devices
B) The edge of Zone I
C) The area where RF power is highest
D) The safe distance for storing oxygen tanks
Explanation: The 5-Gauss line marks where the static magnetic field strength falls
to 0.5 mT (5 Gauss). This is the boundary beyond which it is considered safe for
the general public, including individuals with cardiac pacemakers.
9. An MR Unsafe item is one that:
A) Is safe under all conditions
B) Is known to pose hazards in all MR environments
C) Is safe only under specific conditions
D) Has not been tested
Explanation: "MR Unsafe" is an ASTM label for items that are known to pose
hazards in all MR environments (e.g., a ferromagnetic pair of scissors).
, 10. The MR Medical Director (MRMD) must be:
A) A licensed radiologic technologist
B) A board-certified physician with expertise in MR imaging and safety
C) The head of the biomedical engineering department
D) The hospital's CEO
text
**Explanation:** The MRMD is a supervising physician responsible for the clinical
and safety aspects of the MR service. This requires specific medical and MR
expertise, typically held by a radiologist.
11. Which document outlines the safety information for an implanted medical
device?
A) The patient's insurance card
B) The MR system operator's manual
C) The device's product labeling or manufacturer's website
D) The ACR zoning plan
text
**Explanation:** The definitive source for MR conditional information (static field
limit, spatial gradient limit, SAR limit, etc.) for an implanted device is the
manufacturer's product labeling, which can often be found on their website.
12. The most significant hazard associated with the static magnetic field (B0) is:
A) Tissue heating
B) The projectile effect
C) Peripheral nerve stimulation
D) Acoustic noise
text
**Explanation:** The projectile or "missile" effect, where ferromagnetic objects
are powerfully attracted into the magnet, represents the most immediate and life-
threatening hazard of the static magnetic field.
QUESTIONS WITH CORRECT DETAILED ANSWERS || 100%
GUARANTEED PASS <RECENT VERSION>
Section 1: MR Safety Principles & Governance (Questions 1-25)
1. What is the primary responsibility of the MR Safety Officer (MRSO)?
A) Operating the MR scanner
B) Ensuring patient throughput
C) Establishing and enforcing MR safety policies
D) Performing routine maintenance on the magnet
Explanation: The MRSO is an administrative and supervisory role responsible for
the overall MR safety program, including developing, implementing, and enforcing
policies and procedures to ensure a safe environment for patients, staff, and
visitors.
2. According to the ACR, what is the minimum recommended level of MR
personnel required to be in the MR suite during a routine patient scan?
A) One Level 1 MR Personnel
B) One Level 1 and one Level 2 MR Personnel
C) Two Level 2 MR Personnel
D) Only the MR technologist
Explanation: The ACR recommends that at least two individuals with MR
personnel qualifications be present during a routine patient examination. One
must be Level 2 MR Personnel (e.g., the MR technologist), and the other must be
at least Level 1 MR Personnel (e.g., a nurse or aide).
3. The term "MR Conditional" indicates that an item:
A) Is safe in all MR environments
B) Poses no known hazards in any MR environment
C) Has been demonstrated to pose no known hazards in a specified MR
,environment with specified conditions of use
D) Is unsafe in any MR environment
Explanation: "MR Conditional" is an ASTM labeling term meaning the device or
object has been tested and is safe to use under very specific conditions (e.g., static
field strength, spatial gradient, RF fields, SAR limits). These conditions must be
strictly adhered to.
4. The Quench button should be activated:
A) To cool down the magnet after a long day
B) Only in a life-threatening or catastrophic emergency that cannot be resolved by
other means
C) Whenever a ferromagnetic object is projectile into the bore
D) Routinely to test the system
Explanation: A quench is a serious event that rapidly boils off cryogens and can
cause significant damage and cost. It should only be used as a last resort in a
situation where a person's life is in immediate danger and removing the threat is
impossible without quenching (e.g., a patient is pinned by a large object and is
coding).
5. The four MR Safety Zones, as defined by the ACR, are:
A) Red, Yellow, Green, Blue
B) Zone I, Zone II, Zone III, Zone IV
C) Public, Reception, Scan Room, Control Room
D) Unrestricted, Semi-Restricted, Restricted, Magnet
Explanation: The standard ACR zoning is Zone I (public, uncontrolled access), Zone
II (interface between uncontrolled and strictly controlled areas), Zone III (area
where unscreened individuals could be harmed), and Zone IV (the magnet room
itself).
6. Who is responsible for physically screening all individuals before they enter
Zone III?
A) The MRSO
B) The referring physician
,C) The MR Medical Director
D) Designated, trained MR Safety–Screened Personnel
Explanation: A trained individual (Level 1 or 2) must perform a physical screening
(e.g., using a ferromagnetic detection system, pat-down, questionnaire) on every
person before they are allowed to enter Zone III.
7. The primary source for establishing the MR safety program is the:
A) MR technologist's experience
B) ACR Guidance Document on MR Safe Practices
C) Scanner manufacturer's service manual
D) Hospital administrator's policy
Explanation: The ACR Guidance Document on MR Safe Practices is the most
comprehensive and widely accepted standard for establishing and maintaining an
MR safety program in the clinical setting.
8. A "Gauss line" demarcates:
A) The 5-Gauss line, separating areas where the static magnetic field is strong
enough to be hazardous to certain individuals and devices
B) The edge of Zone I
C) The area where RF power is highest
D) The safe distance for storing oxygen tanks
Explanation: The 5-Gauss line marks where the static magnetic field strength falls
to 0.5 mT (5 Gauss). This is the boundary beyond which it is considered safe for
the general public, including individuals with cardiac pacemakers.
9. An MR Unsafe item is one that:
A) Is safe under all conditions
B) Is known to pose hazards in all MR environments
C) Is safe only under specific conditions
D) Has not been tested
Explanation: "MR Unsafe" is an ASTM label for items that are known to pose
hazards in all MR environments (e.g., a ferromagnetic pair of scissors).
, 10. The MR Medical Director (MRMD) must be:
A) A licensed radiologic technologist
B) A board-certified physician with expertise in MR imaging and safety
C) The head of the biomedical engineering department
D) The hospital's CEO
text
**Explanation:** The MRMD is a supervising physician responsible for the clinical
and safety aspects of the MR service. This requires specific medical and MR
expertise, typically held by a radiologist.
11. Which document outlines the safety information for an implanted medical
device?
A) The patient's insurance card
B) The MR system operator's manual
C) The device's product labeling or manufacturer's website
D) The ACR zoning plan
text
**Explanation:** The definitive source for MR conditional information (static field
limit, spatial gradient limit, SAR limit, etc.) for an implanted device is the
manufacturer's product labeling, which can often be found on their website.
12. The most significant hazard associated with the static magnetic field (B0) is:
A) Tissue heating
B) The projectile effect
C) Peripheral nerve stimulation
D) Acoustic noise
text
**Explanation:** The projectile or "missile" effect, where ferromagnetic objects
are powerfully attracted into the magnet, represents the most immediate and life-
threatening hazard of the static magnetic field.
