Magnetic Resonance Safety Expert
(MRSE) ACUAL EXAM 2025/2026 ||
QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS
<LATEST UPDATE>
1. Field Strength - ANSWER ✓ Measured in Tesla; 1 Tesla (T) = 10,000
Gauss (G)
2. MR Safety Zones - ANSWER ✓ Defined by the American College of
Radiology (ACR); includes Zone 1 (public access), Zone 2 (screening),
Zone 3 (restricted), and Zone 4 (scan room)
3. Ferromagnetic Objects - ANSWER ✓ Objects strongly attracted to magnetic
field; can become dangerous projectiles in the magnet room
4. Implanted Devices - ANSWER ✓ Devices tested for MR safety fall into
categories: MR Safe, MR Unsafe, and MR Conditional
5. Cryogens - ANSWER ✓ Liquefied gases like helium and nitrogen used in
MRI for superconductivity near absolute zero temperatures
6. Quench - ANSWER ✓ Occurs if helium temperature rises, causing it to boil
off; can lead to immense pressure and asphyxiation if not vented outside
,7. Shielding - ANSWER ✓ Necessary to contain the magnetic field within the
scan room; includes passive (steel/iron plates) and active (bucking coils)
shielding
8. Faraday's Law of Electromagnetic Induction - ANSWER ✓ States a
magnetic field is created by a charged moving particle; relevant to RF and
Gradient fields in MRI
9. Specific Absorption Rate (SAR) - ANSWER ✓ Measures tissue heating
from RF nonionizing radiation in MRI; regulated by FDA
10.Claustrophobia Mitigation - ANSWER ✓ Methods to reduce claustrophobia
in MRI include air flow, eye mask, music, mirror, video, and communication
11.Acoustic Noise - ANSWER ✓ Kept at low OSHA levels in MRI; hearing
protection like ear plugs and headphones recommended
12.Antenna Effect - ANSWER ✓ Crossed arms/hands, legs can act as antennas
in MRI leading to burns and nerve stimulation
13.MRI - ANSWER ✓ Magnetic Resonance Imaging, a cross-sectional imaging
modality which acquires images using the application of radio frequency
waves and a strong magnetic field.
14.Atom - ANSWER ✓ The smallest particle of a chemical that can exist (i.e.
singular Hydrogen atom).
15.Molecule - ANSWER ✓ A group of atoms bonded together, representing the
smallest unit of a chemical compound that can take part in a chemical
reaction (i.e. H2O, water, N2 nitrogen, O3 ozone, CaO calcium oxide etc).
16.Proton - ANSWER ✓ Subatomic particle in all atomic nuclei, with a positive
charge (equals the charge of an electron).
17.Voxel - ANSWER ✓ 3-dimensional unit representing pixels and depth in a
given plane.
,18.Ferromagnetic - ANSWER ✓ Material that has a high susceptibility to
magnetization, the strength of which depends on that of the applied
magnetizing field, and which may persist after removal of the applied field.
19.Hydrogen - ANSWER ✓ First element in the periodic table, primary
function in the human body is to hydrate, and it is the most abundant
element in the universe.
20.Static Magnetic Field (B0) - ANSWER ✓ This is ALWAYS on and
polarizes the hydrogen.
21.Radiofrequency Field (B1) - ANSWER ✓ These can be rapidly switched on
and off, excites the hydrogen and detects the resulting signal (NMR).
22.Gradient Magnetic Fields - ANSWER ✓ These can be rapidly switched on
and off and localizes the MR signal.
23.Shim Coils - ANSWER ✓ Corrects inhomogeneities in the static field.
24.What is NMR? - ANSWER ✓ Form of spectroscopy using electromagnetic
radiation
to change state of nuclear spin
25.Horizontal Static Magnetic Field - ANSWER ✓ A magnetic field vector that
is horizontal.
26.Lenz's Force - ANSWER ✓ The process of non-ferrous objects producing a
magnetic field when moved through a strong static magnetic field.
27.Magnetic Field Strength - ANSWER ✓ The overall magnetic field strength
of the MR unit.
28.Magnetic Moment - ANSWER ✓ Each hydrogen proton produces a
particular magnetic field.
29.Magnetohydrodynamic Effect - ANSWER ✓ When patients are exposed to a
strong static magnetic field, their blood becomes magnetized. This causes a
high T wave in their cardiac cycle.
, 30.Paramagnetic - ANSWER ✓ A weakly attractive force when placed in a
static magnetic field.
31.Passive Shielding - ANSWER ✓ Using magnetically conductive materials in
an MR unit reduces the fringe field.
32.Pauli Exclusion Principle - ANSWER ✓ The principle describes the atom
structure and the types of magnetism (ferromagnetism, paramagnetic,
diamagnetism...).
33.Rotational Force - ANSWER ✓ A force that aligns objects affected by the
static magnetic field to its flux lines.
34.Spatial Gradient Magnetic - ANSWER ✓ The changing magnetic field
strength was demonstrated at different distances from the MR unit.
35.Static Magnetic Field - ANSWER ✓ The magnetic field that aligns
hydrogen nuclei parallel or anti-parallel.
36.Superparamagnetic - ANSWER ✓ When placed in a strong static magnetic
field, a stronger attractive force than superparamagnetic, but not as strong as
ferromagnetism.
37.What is nuclear spin described by? - ANSWER ✓ Described by angular
momentum vector, I
38.What does size of I measure? - ANSWER ✓ speed of rotation
39.What does direction of I mean? - ANSWER ✓ axis of rotation
40.What are nuclear spin QN values like? - ANSWER ✓ I = +ve
Integer / 1/2
41.Nuclear spin of protons and neutrons? - ANSWER ✓ 1/2
42.What does overall spin I depend on? What does this mean - ANSWER ✓
isotope
(MRSE) ACUAL EXAM 2025/2026 ||
QUESTIONS WITH CORRECT DETAILED
ANSWERS || 100% GUARANTEED PASS
<LATEST UPDATE>
1. Field Strength - ANSWER ✓ Measured in Tesla; 1 Tesla (T) = 10,000
Gauss (G)
2. MR Safety Zones - ANSWER ✓ Defined by the American College of
Radiology (ACR); includes Zone 1 (public access), Zone 2 (screening),
Zone 3 (restricted), and Zone 4 (scan room)
3. Ferromagnetic Objects - ANSWER ✓ Objects strongly attracted to magnetic
field; can become dangerous projectiles in the magnet room
4. Implanted Devices - ANSWER ✓ Devices tested for MR safety fall into
categories: MR Safe, MR Unsafe, and MR Conditional
5. Cryogens - ANSWER ✓ Liquefied gases like helium and nitrogen used in
MRI for superconductivity near absolute zero temperatures
6. Quench - ANSWER ✓ Occurs if helium temperature rises, causing it to boil
off; can lead to immense pressure and asphyxiation if not vented outside
,7. Shielding - ANSWER ✓ Necessary to contain the magnetic field within the
scan room; includes passive (steel/iron plates) and active (bucking coils)
shielding
8. Faraday's Law of Electromagnetic Induction - ANSWER ✓ States a
magnetic field is created by a charged moving particle; relevant to RF and
Gradient fields in MRI
9. Specific Absorption Rate (SAR) - ANSWER ✓ Measures tissue heating
from RF nonionizing radiation in MRI; regulated by FDA
10.Claustrophobia Mitigation - ANSWER ✓ Methods to reduce claustrophobia
in MRI include air flow, eye mask, music, mirror, video, and communication
11.Acoustic Noise - ANSWER ✓ Kept at low OSHA levels in MRI; hearing
protection like ear plugs and headphones recommended
12.Antenna Effect - ANSWER ✓ Crossed arms/hands, legs can act as antennas
in MRI leading to burns and nerve stimulation
13.MRI - ANSWER ✓ Magnetic Resonance Imaging, a cross-sectional imaging
modality which acquires images using the application of radio frequency
waves and a strong magnetic field.
14.Atom - ANSWER ✓ The smallest particle of a chemical that can exist (i.e.
singular Hydrogen atom).
15.Molecule - ANSWER ✓ A group of atoms bonded together, representing the
smallest unit of a chemical compound that can take part in a chemical
reaction (i.e. H2O, water, N2 nitrogen, O3 ozone, CaO calcium oxide etc).
16.Proton - ANSWER ✓ Subatomic particle in all atomic nuclei, with a positive
charge (equals the charge of an electron).
17.Voxel - ANSWER ✓ 3-dimensional unit representing pixels and depth in a
given plane.
,18.Ferromagnetic - ANSWER ✓ Material that has a high susceptibility to
magnetization, the strength of which depends on that of the applied
magnetizing field, and which may persist after removal of the applied field.
19.Hydrogen - ANSWER ✓ First element in the periodic table, primary
function in the human body is to hydrate, and it is the most abundant
element in the universe.
20.Static Magnetic Field (B0) - ANSWER ✓ This is ALWAYS on and
polarizes the hydrogen.
21.Radiofrequency Field (B1) - ANSWER ✓ These can be rapidly switched on
and off, excites the hydrogen and detects the resulting signal (NMR).
22.Gradient Magnetic Fields - ANSWER ✓ These can be rapidly switched on
and off and localizes the MR signal.
23.Shim Coils - ANSWER ✓ Corrects inhomogeneities in the static field.
24.What is NMR? - ANSWER ✓ Form of spectroscopy using electromagnetic
radiation
to change state of nuclear spin
25.Horizontal Static Magnetic Field - ANSWER ✓ A magnetic field vector that
is horizontal.
26.Lenz's Force - ANSWER ✓ The process of non-ferrous objects producing a
magnetic field when moved through a strong static magnetic field.
27.Magnetic Field Strength - ANSWER ✓ The overall magnetic field strength
of the MR unit.
28.Magnetic Moment - ANSWER ✓ Each hydrogen proton produces a
particular magnetic field.
29.Magnetohydrodynamic Effect - ANSWER ✓ When patients are exposed to a
strong static magnetic field, their blood becomes magnetized. This causes a
high T wave in their cardiac cycle.
, 30.Paramagnetic - ANSWER ✓ A weakly attractive force when placed in a
static magnetic field.
31.Passive Shielding - ANSWER ✓ Using magnetically conductive materials in
an MR unit reduces the fringe field.
32.Pauli Exclusion Principle - ANSWER ✓ The principle describes the atom
structure and the types of magnetism (ferromagnetism, paramagnetic,
diamagnetism...).
33.Rotational Force - ANSWER ✓ A force that aligns objects affected by the
static magnetic field to its flux lines.
34.Spatial Gradient Magnetic - ANSWER ✓ The changing magnetic field
strength was demonstrated at different distances from the MR unit.
35.Static Magnetic Field - ANSWER ✓ The magnetic field that aligns
hydrogen nuclei parallel or anti-parallel.
36.Superparamagnetic - ANSWER ✓ When placed in a strong static magnetic
field, a stronger attractive force than superparamagnetic, but not as strong as
ferromagnetism.
37.What is nuclear spin described by? - ANSWER ✓ Described by angular
momentum vector, I
38.What does size of I measure? - ANSWER ✓ speed of rotation
39.What does direction of I mean? - ANSWER ✓ axis of rotation
40.What are nuclear spin QN values like? - ANSWER ✓ I = +ve
Integer / 1/2
41.Nuclear spin of protons and neutrons? - ANSWER ✓ 1/2
42.What does overall spin I depend on? What does this mean - ANSWER ✓
isotope
