ARMRIT UPDATED COMPREHENSIVE EXAM QUESTIONS
AND ANSWERS SURE A+
✔✔The artifact known as crosstalk can be corrected for by adjusting which parameter
A) FOV
B) TR
C) slice thickness
D) slice interval
E) NEX - ✔✔slice interval
✔✔in terms of time, the least expensive parameter to increase, of those that affect time,
when attempting to improve image quality is:
A) Matrix
B) TR
C) NEX
D) # of slices
E) none - ✔✔TR
✔✔by increasing the parameter, matrix, the size of the pixel will:
A) decrease
B) increase
C) stay the same
D) vary - ✔✔decrease
✔✔increasing which parameter is considered the best technique for improving image
quality
A) Matrix
B) TR
C) NEX
D) # of slices
E) none - ✔✔NEX
✔✔of the following techniques, which one is applied to prevent crosstalk between multi-
slices with little to no interslice gap?
A) pre-saturation
B) off-center FOV
C) flow enhancement
D) interleaving
E) even echo rephasing - ✔✔interleaving
✔✔residual magnetic gradients that persist for a variable time duration after the pulse of
electricity from the gradient power supply is terminated are known as:
A) chemical shift
B) inhomogeneities
C) eddy currents
,D) magnetic susceptibilities
E) T2* - ✔✔eddy currents
✔✔the slice selection gradient exposes the patients body to a series of increasing or
decreasing magnetic fields to select a slice. in what relation to the slice is this gradient
introduced
A) antiparallel
B) parallel
C) oblique
D) perpendicular
E) none - ✔✔perpendicular
✔✔which method of providing spatial localization is employed during a pulse sequence
when selecting only one slice at a time?
A) FID
B) FT
C) FFT
D) 2DFT
E) 3DFT - ✔✔2DFT
✔✔which method of providing spatial localization is employed during a pulse sequence
when selecting a volume of slices?
A) FID
B) FT
C) FFT
D) 2DFT
E) 3DFT - ✔✔3DFT
✔✔for MRI magnets, the specification for field homogeneity that is considered
acceptable is:
A) 5-10ppm
B) 10-15ppm
C) 20-30ppm
D) 40-50ppm - ✔✔20-30ppm
✔✔the primary factor of an inversion recovery pulse sequence is which of the following
parameters?
A) TR
B) TE
C) TI
D) FSE
E) MRA - ✔✔TI
✔✔of the different types of coils used in MRI, which type(s) are found only in the
housing of the main magnet?
, A) surface coils
B) radio frequency coils
C) Heimholtz coils
D) shim/gradient coils
E) all - ✔✔shim/gradient coils
✔✔which of the following causes of artifacts on MR images is most commonly mistaken
for a pathological signal?
A) eddy currents
B) magnetic susceptibility
C) chemical shift
D) untuned RF coils
E) ferromagnetic object - ✔✔chemical shift
✔✔of the following anatomical structures, which is considered to be normally enhancing
post gadolinium injection?
A) cerebellum
B) choroid plexus
C) intervertebral disc
D) auditory nerves
E) corpus callosum - ✔✔choroid plexus
✔✔cryogen levels should never fall below:
A) 23%
B) 30%
C) 50%
D) 66%
E) 80% - ✔✔50%
✔✔the electromagnetic coil responsible for producing the strong magnetic field of a
superconducting magnet is embedded in a _____________ which serves as an
insulator from heat in the even of a quench.
A) niobium-titanium matrix
B) lead matrix
C) carbon composite matrix
D) steel matrix
E) copper matrix - ✔✔copper matrix
✔✔there are ____________ of _____________ serving the purpose of providing spatial
information within the MR signal
A) 3 pairs/ gradient coils
B) 2 pairs/ shim coils
C) 2 pairs/ RF amplifiers
D) 6 pairs/ solenoid coils - ✔✔3 pairs/ gradient coils
AND ANSWERS SURE A+
✔✔The artifact known as crosstalk can be corrected for by adjusting which parameter
A) FOV
B) TR
C) slice thickness
D) slice interval
E) NEX - ✔✔slice interval
✔✔in terms of time, the least expensive parameter to increase, of those that affect time,
when attempting to improve image quality is:
A) Matrix
B) TR
C) NEX
D) # of slices
E) none - ✔✔TR
✔✔by increasing the parameter, matrix, the size of the pixel will:
A) decrease
B) increase
C) stay the same
D) vary - ✔✔decrease
✔✔increasing which parameter is considered the best technique for improving image
quality
A) Matrix
B) TR
C) NEX
D) # of slices
E) none - ✔✔NEX
✔✔of the following techniques, which one is applied to prevent crosstalk between multi-
slices with little to no interslice gap?
A) pre-saturation
B) off-center FOV
C) flow enhancement
D) interleaving
E) even echo rephasing - ✔✔interleaving
✔✔residual magnetic gradients that persist for a variable time duration after the pulse of
electricity from the gradient power supply is terminated are known as:
A) chemical shift
B) inhomogeneities
C) eddy currents
,D) magnetic susceptibilities
E) T2* - ✔✔eddy currents
✔✔the slice selection gradient exposes the patients body to a series of increasing or
decreasing magnetic fields to select a slice. in what relation to the slice is this gradient
introduced
A) antiparallel
B) parallel
C) oblique
D) perpendicular
E) none - ✔✔perpendicular
✔✔which method of providing spatial localization is employed during a pulse sequence
when selecting only one slice at a time?
A) FID
B) FT
C) FFT
D) 2DFT
E) 3DFT - ✔✔2DFT
✔✔which method of providing spatial localization is employed during a pulse sequence
when selecting a volume of slices?
A) FID
B) FT
C) FFT
D) 2DFT
E) 3DFT - ✔✔3DFT
✔✔for MRI magnets, the specification for field homogeneity that is considered
acceptable is:
A) 5-10ppm
B) 10-15ppm
C) 20-30ppm
D) 40-50ppm - ✔✔20-30ppm
✔✔the primary factor of an inversion recovery pulse sequence is which of the following
parameters?
A) TR
B) TE
C) TI
D) FSE
E) MRA - ✔✔TI
✔✔of the different types of coils used in MRI, which type(s) are found only in the
housing of the main magnet?
, A) surface coils
B) radio frequency coils
C) Heimholtz coils
D) shim/gradient coils
E) all - ✔✔shim/gradient coils
✔✔which of the following causes of artifacts on MR images is most commonly mistaken
for a pathological signal?
A) eddy currents
B) magnetic susceptibility
C) chemical shift
D) untuned RF coils
E) ferromagnetic object - ✔✔chemical shift
✔✔of the following anatomical structures, which is considered to be normally enhancing
post gadolinium injection?
A) cerebellum
B) choroid plexus
C) intervertebral disc
D) auditory nerves
E) corpus callosum - ✔✔choroid plexus
✔✔cryogen levels should never fall below:
A) 23%
B) 30%
C) 50%
D) 66%
E) 80% - ✔✔50%
✔✔the electromagnetic coil responsible for producing the strong magnetic field of a
superconducting magnet is embedded in a _____________ which serves as an
insulator from heat in the even of a quench.
A) niobium-titanium matrix
B) lead matrix
C) carbon composite matrix
D) steel matrix
E) copper matrix - ✔✔copper matrix
✔✔there are ____________ of _____________ serving the purpose of providing spatial
information within the MR signal
A) 3 pairs/ gradient coils
B) 2 pairs/ shim coils
C) 2 pairs/ RF amplifiers
D) 6 pairs/ solenoid coils - ✔✔3 pairs/ gradient coils
