ARRT review - MRI registry review
program
___ is used for determining tissue viability and evaluating whether nutrients are being
properly delivered to the brain cells.
a. angiography
b. diffusion weighted imaging
c. perfusion weighted imaging
d. spectroscopy - ANS-c.
___ pulse sequences display the effects of magnetic susceptibility.
a. spin echo
b. spoiled gradient echo
c. fast spin echo
d. inversion recovery - ANS-b.
___ pulses sequences are most likely to exceed the FDA's limitation on time varying
magnetic fields.
a. Fast spin echo
b. Spin echo
c. Echo planar
d. Gradient echo - ANS-c.
___ would NOT reduce the severity of flow artifacts in T2- weighted images of the brain.
a. properly placed saturation pulse
b. a narrower receiver bandwidth
c. gradient moment nulling
d. pulse triggering - ANS-b.
____ artifact may occur in the MR images as a direct result of acquiring them with the
scan room door open.
a. chemical shift
b. aliasing
,c. magnetic susceptibility
d. RF - ANS-d.
____ is a methos used by MRI system manufacturers to reduce wrap around in the slice
direction on volume acquisitions.
a. leaving gaps in between slices
b. magnifying the resulting images
c. encoding extra end slices and then discarding them
d. adding extra gradient pulses - ANS-c.
____ Is NOT a characteristic of the steady state gradient echo pulse sequence.
a. a user-selectable RF flip angle
b. a refocused transverse magnetization following the formation of the echo
c. spin-spin interactions
d. 180 RF pulse - ANS-d.
____ is NOT a good application for 3D gradient echo pulse sequence.
a. rulling out disc disease
b. an occluded right carotid artery
c. a screening for metastatic lesions
d. a torn anterior cruciate ligament - ANS-c.
____ is NOT normally found in a H spectrum of brain tissue.
a. Creatine (Cr)
b. Lactate
c. Olefin sulfonate
d. N-acetyl aspartic acid (NAA) - ANS-c.
Included in H spectrum:
Creatine
Lactate
NAA
Choline
Lipid
Glutamine/ Glutamate
,Myo-inostol
____ is the method to reduce the MR scan time that also results in a loss of resolution.
a. reducing the TR
b. applying parellel imaging
c. applying RFOV
d. reducing the matrix - ANS-d.
____ is the pulse sequence most commonly used in perfusion weighted imaging.
a Echo planar imaging
b. gradient echo
c. conventional spin echo
d. fast spin echo - ANS-a.
____ magnets are currently being used in MRI systems.
1. permanent
2. superconducting
3. resistive - ANS-ALL
____ magnets are routinely used in producing a magnetic field of 1.5T
a. permanent
b. superconducting
c. bar
d. resistive - ANS-b.
____ magnets cannot lose their magnetic field without being disassembled.
a. permanent
b. superconducting
c. resistive
d. electro - ANS-a.
____ magnets require a constant connection to a power source in order to maintain
their magnetic field.
a. permanent
, b. superconducting
c. bar
d. resistive - ANS-a.
____ shielding is another name for Faraday shielding.
a. magnetic
b. active
c. RF
d. gradient - ANS-c.
____ will eliminate the wraparound artifact from the top and bottom of a coronal knee
image (assuming that the frequency encoding is accomplished with a z-gradient, and
using the coordinate axis convention above).
standard z y x coordinates; post test 12; page 45)
1. increasing FOV
2. applying the no frequency wrap option
3. applying a single saturation region - ANS-2 ONLY
____ will reduce or eliminate the artifact in the image (RF artifact).
a. properly using the RF shielding
b. performing more signal averages
c. applying physiological triggering
d. applying a rawdata filter - ANS-a.
A ___ would provide the best image quality and uniform signal intensity for a bilateral
study of the orbits.
a. body coil
b. four inch circular coil positioned over the left eye
c. head coil
d. flex coil - ANS-c.
A ____ pulse sequence demonstrates the least amount of magnetic susceptibility
artifact.
a. fast gradient echo
program
___ is used for determining tissue viability and evaluating whether nutrients are being
properly delivered to the brain cells.
a. angiography
b. diffusion weighted imaging
c. perfusion weighted imaging
d. spectroscopy - ANS-c.
___ pulse sequences display the effects of magnetic susceptibility.
a. spin echo
b. spoiled gradient echo
c. fast spin echo
d. inversion recovery - ANS-b.
___ pulses sequences are most likely to exceed the FDA's limitation on time varying
magnetic fields.
a. Fast spin echo
b. Spin echo
c. Echo planar
d. Gradient echo - ANS-c.
___ would NOT reduce the severity of flow artifacts in T2- weighted images of the brain.
a. properly placed saturation pulse
b. a narrower receiver bandwidth
c. gradient moment nulling
d. pulse triggering - ANS-b.
____ artifact may occur in the MR images as a direct result of acquiring them with the
scan room door open.
a. chemical shift
b. aliasing
,c. magnetic susceptibility
d. RF - ANS-d.
____ is a methos used by MRI system manufacturers to reduce wrap around in the slice
direction on volume acquisitions.
a. leaving gaps in between slices
b. magnifying the resulting images
c. encoding extra end slices and then discarding them
d. adding extra gradient pulses - ANS-c.
____ Is NOT a characteristic of the steady state gradient echo pulse sequence.
a. a user-selectable RF flip angle
b. a refocused transverse magnetization following the formation of the echo
c. spin-spin interactions
d. 180 RF pulse - ANS-d.
____ is NOT a good application for 3D gradient echo pulse sequence.
a. rulling out disc disease
b. an occluded right carotid artery
c. a screening for metastatic lesions
d. a torn anterior cruciate ligament - ANS-c.
____ is NOT normally found in a H spectrum of brain tissue.
a. Creatine (Cr)
b. Lactate
c. Olefin sulfonate
d. N-acetyl aspartic acid (NAA) - ANS-c.
Included in H spectrum:
Creatine
Lactate
NAA
Choline
Lipid
Glutamine/ Glutamate
,Myo-inostol
____ is the method to reduce the MR scan time that also results in a loss of resolution.
a. reducing the TR
b. applying parellel imaging
c. applying RFOV
d. reducing the matrix - ANS-d.
____ is the pulse sequence most commonly used in perfusion weighted imaging.
a Echo planar imaging
b. gradient echo
c. conventional spin echo
d. fast spin echo - ANS-a.
____ magnets are currently being used in MRI systems.
1. permanent
2. superconducting
3. resistive - ANS-ALL
____ magnets are routinely used in producing a magnetic field of 1.5T
a. permanent
b. superconducting
c. bar
d. resistive - ANS-b.
____ magnets cannot lose their magnetic field without being disassembled.
a. permanent
b. superconducting
c. resistive
d. electro - ANS-a.
____ magnets require a constant connection to a power source in order to maintain
their magnetic field.
a. permanent
, b. superconducting
c. bar
d. resistive - ANS-a.
____ shielding is another name for Faraday shielding.
a. magnetic
b. active
c. RF
d. gradient - ANS-c.
____ will eliminate the wraparound artifact from the top and bottom of a coronal knee
image (assuming that the frequency encoding is accomplished with a z-gradient, and
using the coordinate axis convention above).
standard z y x coordinates; post test 12; page 45)
1. increasing FOV
2. applying the no frequency wrap option
3. applying a single saturation region - ANS-2 ONLY
____ will reduce or eliminate the artifact in the image (RF artifact).
a. properly using the RF shielding
b. performing more signal averages
c. applying physiological triggering
d. applying a rawdata filter - ANS-a.
A ___ would provide the best image quality and uniform signal intensity for a bilateral
study of the orbits.
a. body coil
b. four inch circular coil positioned over the left eye
c. head coil
d. flex coil - ANS-c.
A ____ pulse sequence demonstrates the least amount of magnetic susceptibility
artifact.
a. fast gradient echo
