ARMRIT MRI Technologist Exam — Verified
Practice Questions and answers
Section 1: MRI Physics & Instrumentation
1. When the net magnetization in the XY plane has ceased to exist, the condition of
______ has been reached.
A) saturation
B) equilibrium
C) rephasing
D) resonance
Answer: B
2. An RF pulse transmitted with a strength and duration sufficient to flip the M vector from
the Z axis to the XY plane is a(n):
A) 90 degree pulse
B) 180 degree pulse
C) inversion pulse
D) gradient pulse
Answer: A
3. An MR signal is generated when the NMV is:
A) along the Z axis
B) at equilibrium
C) some value greater than zero in the XY plane
D) completely dephased
Answer: C
4. Following the excitation pulse, the FID decays:
A) linearly
B) exponentially
C) during the 180 degree RF pulse
D) along the Z axis
Answer: B
5. The MR signal is strongest when the precessing nuclei are:
A) in phase coherence
B) aligned with B0
C) out of phase
D) at equilibrium
Answer: A
,6. Measurement of the magnetic field strength outside the bore of the MR image is most
typically expressed in units of:
A) gauss
B) tesla
C) megahertz
D) magnetogyric
Answer: A
7. Nuclei in their natural environment (in the absence of a significant magnetic field) are
aligned:
A) with magnetic north
B) randomly
C) parallel
D) transverse
E) anti-parallel
Answer: B
8. ______ occurs when the frequency of the RF pulse matches the frequency of the
precessing nuclei.
A) dephasing
B) relaxation
C) saturation
D) resonance
Answer: D
9. T2 is the characteristic time constant for:
A) 63% loss of magnetization in the XY plane
B) 37% loss of magnetization in the transverse plane
C) 86% regrowth of transverse magnetization
D) 63% regrowth of longitudinal magnetization
Answer: B
10. The NMV will generate a stronger MR signal if the alignment is at:
A) 180 degrees
B) 120 degrees
C) 90 degrees
D) 360 degrees
Answer: C
11. The ______ and ______ are the terms which indicate the amount the macroscopic
magnetization vector is rotated by RF pulse with respect to the static magnetic field.
A) flip angle/nutation angle
B) T1/T2 relaxation
, C) Larmor/resonance frequency
D) Tesla/gauss
Answer: A
12. Nuclei having an ______ of nucleons (neutrons and protons) will tend to possess
magnetic properties.
A) even number
B) isotropic number
C) excess number
D) odd number
Answer: D
13. The tendency of a substance to become magnetized or to distort an applied magnetic
field is:
A) ferromagnetic
B) magnetic susceptibility
C) diamagnetic
D) superconducting
Answer: B
14. ______ is the uniformity of the static magnetic field, expressed in terms of PPM (parts
per million) over a defined volume.
A) hertz
B) homogeneity
C) shim
D) B0
Answer: B
15. What is the lightest of all atoms?
A) Oxygen
B) Carbon
C) Hydrogen
D) Nitrogen
Answer: C
16. What subatomic particle has a positive charge?
A) Electron
B) Neutron
C) Proton
D) Positron
Answer: C
17. The exact middle of the bore of the magnet is termed:
A) Fringe field
Practice Questions and answers
Section 1: MRI Physics & Instrumentation
1. When the net magnetization in the XY plane has ceased to exist, the condition of
______ has been reached.
A) saturation
B) equilibrium
C) rephasing
D) resonance
Answer: B
2. An RF pulse transmitted with a strength and duration sufficient to flip the M vector from
the Z axis to the XY plane is a(n):
A) 90 degree pulse
B) 180 degree pulse
C) inversion pulse
D) gradient pulse
Answer: A
3. An MR signal is generated when the NMV is:
A) along the Z axis
B) at equilibrium
C) some value greater than zero in the XY plane
D) completely dephased
Answer: C
4. Following the excitation pulse, the FID decays:
A) linearly
B) exponentially
C) during the 180 degree RF pulse
D) along the Z axis
Answer: B
5. The MR signal is strongest when the precessing nuclei are:
A) in phase coherence
B) aligned with B0
C) out of phase
D) at equilibrium
Answer: A
,6. Measurement of the magnetic field strength outside the bore of the MR image is most
typically expressed in units of:
A) gauss
B) tesla
C) megahertz
D) magnetogyric
Answer: A
7. Nuclei in their natural environment (in the absence of a significant magnetic field) are
aligned:
A) with magnetic north
B) randomly
C) parallel
D) transverse
E) anti-parallel
Answer: B
8. ______ occurs when the frequency of the RF pulse matches the frequency of the
precessing nuclei.
A) dephasing
B) relaxation
C) saturation
D) resonance
Answer: D
9. T2 is the characteristic time constant for:
A) 63% loss of magnetization in the XY plane
B) 37% loss of magnetization in the transverse plane
C) 86% regrowth of transverse magnetization
D) 63% regrowth of longitudinal magnetization
Answer: B
10. The NMV will generate a stronger MR signal if the alignment is at:
A) 180 degrees
B) 120 degrees
C) 90 degrees
D) 360 degrees
Answer: C
11. The ______ and ______ are the terms which indicate the amount the macroscopic
magnetization vector is rotated by RF pulse with respect to the static magnetic field.
A) flip angle/nutation angle
B) T1/T2 relaxation
, C) Larmor/resonance frequency
D) Tesla/gauss
Answer: A
12. Nuclei having an ______ of nucleons (neutrons and protons) will tend to possess
magnetic properties.
A) even number
B) isotropic number
C) excess number
D) odd number
Answer: D
13. The tendency of a substance to become magnetized or to distort an applied magnetic
field is:
A) ferromagnetic
B) magnetic susceptibility
C) diamagnetic
D) superconducting
Answer: B
14. ______ is the uniformity of the static magnetic field, expressed in terms of PPM (parts
per million) over a defined volume.
A) hertz
B) homogeneity
C) shim
D) B0
Answer: B
15. What is the lightest of all atoms?
A) Oxygen
B) Carbon
C) Hydrogen
D) Nitrogen
Answer: C
16. What subatomic particle has a positive charge?
A) Electron
B) Neutron
C) Proton
D) Positron
Answer: C
17. The exact middle of the bore of the magnet is termed:
A) Fringe field
