MRSO FINAL EXAM(ACTUAL EXAM)
QUESTIONS WITH VERY ELABORATED
ANSWERS CORRECTRY WELL ORGANIZED
LATEST 2024 – 2025 ALREADY GRADED A+
The amount of energy used to tilt hydrogen from longitudinal magnetism into the
transverse axis. - ANSWERS-90 degree RF
The amount of energy used to move hydrogen 180 degrees. This is used in a spin
echo sequence to regain phase coherency. - ANSWERS-180 Degree RF
A term used to describe body types based on shape and size. - ANSWERS-Body
Habitus
The unit used to describe the time-varying RF magnetic field. - ANSWERS-B sub 1
What direction is the vector of a permanent MR unit?
,A. Horizontal
B. Vertical
C. Diagonal
D. Variable - ANSWERS-B. Vertical
What separates a superconducting MR unit from a resistive MR unit?
A. Cryogen
B. Coils of wires
C. Permanent magnets
D. none of the choices - ANSWERS-A. Cryogen
The increasing strength of magnetism as we move closer to the MR unit is called
what?
A. Ferromagnetism
B. Spatial magnetic gradient field
C. Vector
D. B0 - ANSWERS-B. Spatial magnetic gradient field
What is responsible for attracting ferrous objects into the MR unit?
A. Spatial magnetic gradient fields
B. Strong uniform magnetic fields
C. Gradient coils
,D. Radiofrequency system - ANSWERS-A. Spatial magnetic gradient fields
If we placed a small ferrous object at isocenter, what would we expect to
happen?
A. The object would experience no attraction.
B. The object would immediately be attracted to the bore.
C. The object would levitate.
D. The object would be repulsed by the unit. - ANSWERS-A. The object would
experience no attraction.
Rotational force will be the strongest at what location?
A. Isocenter
B. Outside the MR room
C. At the gantry opening
D. At the 5 gauss line - ANSWERS-A. Isocenter
How do magnetic flux lines travel?
A. North to South
B. South to North
C. East to West
D. West to East - ANSWERS-A North to South
, Which of the following can be potential safety concerns to a patient in the static
magnetic field?
A. Electrically conductive materials
B. Ferrous objects
C. Magnetic objects
D. All of the choices. - ANSWERS-D. All of the choices
An object that retains its magnetic field when exiting the static magnetic field is
call what?
A. Paramagnetic
B. Diamagnetic
C. Ferromagnetic
D. Superparamagnetic - ANSWERS-C. Ferromagnetic
Passive shielding uses which of the following?
A. Coils of wires with electrical current running through them.
B. Magnetically conductive materials
C. Plastic
D. Wood - ANSWERS-B. Magnetically conductive materials
How can we reduce risks associated with Lenz's force?
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