ARRT MRI Mock Registry
_______ is when only half the views of k-space are filled in the frequency axis.
A. Anti aliasing
B. Parallel imaging
C. Half fourier
D. Partial or fractional echo
E. 1/2 TE (TAU) - ANS-Partial or fractional echo
\________ sequences use T1 gradient echoes with TR and FA selections to suppress signal
from stationary tissues, visualizing flowing blood by flow-related enhancement, whereas
__________ sequences use T2 gradient echoes with parameter selections that suppress
stationary tissue and rely on velocity-induced phase shifts for vascular signal.
A. CE MRA; PC MRA
B. TOF MRA; CE MRA
C. PC MRA; TOF MRA
D. TOF MRA; PC MRA
E. PC MRA; CE MRA - ANS-TOF MRA; PC MRA
\___________ could be used to line the walls and/or floors of the MR magnet room to
reduce the fringe field, and is defined as __________ shielding.
A. Copper; active
B. Steel; active
C. Copper; passive
D. Steel; passive
E. Lead; active - ANS-Steel; passive
\A disadvantage of TOF MRA is high signal in some background tissues. To minimize signal
from background tissues, TE should be selected that enable the signals from fat and water
to be:
A. Presaturated
B. Nulled
C. In phase
D. Out of phase - ANS-Out of phase
\A gradient echo sequence in which all the remaining residual transverse magnetization is
removed prior to the next excitation pulse is known as:
A. Incoherent or spoiled
B. Steady state
C. Magnetization prepped
D. Dual IR - ANS-Incoherent or spoiled
\A magnetic vector possesses attributes of both __________ and _____________.
A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
D. Magnitude; direction - ANS-Magnitude; direction
\A major advantage of a 2D time of flight over a 3D time of flight sequence is the ability to:
A. Determine the precise, accurate percentage of stenosis
B. Better image retrograde flow
, C. Complete image acquisition in twice the time
D. Image larger areas without saturation of flowing blood - ANS-Image larger areas without
saturation of flowing blood
\A narrow receiver bandwidth:
A. Should be used in the presence of metal artifacts
B. Reduces SNR
C. Decreases susceptibility artifact
D. Increases susceptibility artifact
E. B and D - ANS-Increases susceptibility artifact
\A remedy for a Gibbs truncation artifact would be:
A. Increase the field of view
B. Reduce the number of phase encodings
C. Increase the number of phase encodings
D. Decrease the TE - ANS-Increase the number of phase encodings
\A STIR sequence with a TI time of 160 ms will null signal from fat at what field strength?
A. 0.5T
B. 0.8T
C. 1.0T
D. 1.5T
E. 3.0T - ANS-1.5T
\A technique utilized to reduce the MRI scan time which requires the use of an array coil is:
A. Half Fourier
B. Parallel imaging
C. 1/2 NEX
D. Rectangular FOV
E. Partial / Fractional echo - ANS-Parallel imaging
\A technologist may be permitted to administer oxygen in an emergency situation. The most
common rate used is:
A. 2L/min
B. 5L/min
C. 10L/min
D. 20L/min - ANS-2L/min
\Acquiring a bit more than half the phase k-space samples, then interpolating the data with
zeroes for the remaining half is a technique known as:
A. Half Fourier
B. Fast spin echo
C. Zero Fill
D. Spoiled Gradient Echo
E. All of the above
F. A, C and/or D only
G. A and/or C only - ANS-A and/or C only
\Active shielding can be defined as:
A. Copper lining in the walls of the scanner room
B. Performing robust prescan measurements for the purpose of field homogeneity
C. Steel lining in the walls of the scanner room
D. Superconducting windings within the MR scanner, reducing the fringe magnetic field
E. Monthly adjustments made to the magnetic field for the purpose of field uniformity -
ANS-Superconducting windings within the MR scanner, reducing the fringe magnetic field
, \All of the following are examples of INTRINSIC contrast parameters in tissues EXCEPT:
A. Proton density
B. ADC (apparent diffusion coefficient)
C. T2 time of tissue
D. T1 time of tissue
E. TR - ANS-TR
\All of the following artifacts except ________ occur along the phase encoding axis.
A. Aliasing
B. Ghosting
C. Wrap around
D. Chemical shift - ANS-Chemical shift
\All of the following comprise the biliary tree EXCEPT:
A. Left hepatic duct
B. Right hepatic duct
C. Common bile duct
D. Splenic duct
E. Pancreatic duct - ANS-Splenic duct
\All of the following would aid in reducing scan time EXCEPT:
A. Increasing parallel imaging factor
B. Reduction in ETL
C. Reduction in NEX
D. Utilizing the coarsest matrix possible
E. Enabling half-fourier option
F. Reducing TR - ANS-Reduction in ETL
\All of the following yield a higher signal-to-noise ratio EXCEPT:
A. Increase in TR
B. Larger FOV
C. Higher NEX
D. Decrease in ETL
E. Increase in TE
F. Reduction in phase matrix - ANS-Increase in TE
\An adverse reaction or complication caused by treatment from a healthcare professional is
called:
A. Anaphylactic
B. Nosocomial
C. Iatrogenic
D. Idiopathic - ANS-Iatrogenic
\Another term used for "fever" is:
A. Hypothermia
B. Apnea
C. Dystonia
D. Febrile - ANS-Febrile
\As the number of phase encodings is increased from 256 to 512, SNR (signal to noise
ratio):
A. Increases
B. Decreases
C. Doubles
D. Does not change
_______ is when only half the views of k-space are filled in the frequency axis.
A. Anti aliasing
B. Parallel imaging
C. Half fourier
D. Partial or fractional echo
E. 1/2 TE (TAU) - ANS-Partial or fractional echo
\________ sequences use T1 gradient echoes with TR and FA selections to suppress signal
from stationary tissues, visualizing flowing blood by flow-related enhancement, whereas
__________ sequences use T2 gradient echoes with parameter selections that suppress
stationary tissue and rely on velocity-induced phase shifts for vascular signal.
A. CE MRA; PC MRA
B. TOF MRA; CE MRA
C. PC MRA; TOF MRA
D. TOF MRA; PC MRA
E. PC MRA; CE MRA - ANS-TOF MRA; PC MRA
\___________ could be used to line the walls and/or floors of the MR magnet room to
reduce the fringe field, and is defined as __________ shielding.
A. Copper; active
B. Steel; active
C. Copper; passive
D. Steel; passive
E. Lead; active - ANS-Steel; passive
\A disadvantage of TOF MRA is high signal in some background tissues. To minimize signal
from background tissues, TE should be selected that enable the signals from fat and water
to be:
A. Presaturated
B. Nulled
C. In phase
D. Out of phase - ANS-Out of phase
\A gradient echo sequence in which all the remaining residual transverse magnetization is
removed prior to the next excitation pulse is known as:
A. Incoherent or spoiled
B. Steady state
C. Magnetization prepped
D. Dual IR - ANS-Incoherent or spoiled
\A magnetic vector possesses attributes of both __________ and _____________.
A. Strength; magnitude
B. Direction; purpose
C. Strength; flow
D. Magnitude; direction - ANS-Magnitude; direction
\A major advantage of a 2D time of flight over a 3D time of flight sequence is the ability to:
A. Determine the precise, accurate percentage of stenosis
B. Better image retrograde flow
, C. Complete image acquisition in twice the time
D. Image larger areas without saturation of flowing blood - ANS-Image larger areas without
saturation of flowing blood
\A narrow receiver bandwidth:
A. Should be used in the presence of metal artifacts
B. Reduces SNR
C. Decreases susceptibility artifact
D. Increases susceptibility artifact
E. B and D - ANS-Increases susceptibility artifact
\A remedy for a Gibbs truncation artifact would be:
A. Increase the field of view
B. Reduce the number of phase encodings
C. Increase the number of phase encodings
D. Decrease the TE - ANS-Increase the number of phase encodings
\A STIR sequence with a TI time of 160 ms will null signal from fat at what field strength?
A. 0.5T
B. 0.8T
C. 1.0T
D. 1.5T
E. 3.0T - ANS-1.5T
\A technique utilized to reduce the MRI scan time which requires the use of an array coil is:
A. Half Fourier
B. Parallel imaging
C. 1/2 NEX
D. Rectangular FOV
E. Partial / Fractional echo - ANS-Parallel imaging
\A technologist may be permitted to administer oxygen in an emergency situation. The most
common rate used is:
A. 2L/min
B. 5L/min
C. 10L/min
D. 20L/min - ANS-2L/min
\Acquiring a bit more than half the phase k-space samples, then interpolating the data with
zeroes for the remaining half is a technique known as:
A. Half Fourier
B. Fast spin echo
C. Zero Fill
D. Spoiled Gradient Echo
E. All of the above
F. A, C and/or D only
G. A and/or C only - ANS-A and/or C only
\Active shielding can be defined as:
A. Copper lining in the walls of the scanner room
B. Performing robust prescan measurements for the purpose of field homogeneity
C. Steel lining in the walls of the scanner room
D. Superconducting windings within the MR scanner, reducing the fringe magnetic field
E. Monthly adjustments made to the magnetic field for the purpose of field uniformity -
ANS-Superconducting windings within the MR scanner, reducing the fringe magnetic field
, \All of the following are examples of INTRINSIC contrast parameters in tissues EXCEPT:
A. Proton density
B. ADC (apparent diffusion coefficient)
C. T2 time of tissue
D. T1 time of tissue
E. TR - ANS-TR
\All of the following artifacts except ________ occur along the phase encoding axis.
A. Aliasing
B. Ghosting
C. Wrap around
D. Chemical shift - ANS-Chemical shift
\All of the following comprise the biliary tree EXCEPT:
A. Left hepatic duct
B. Right hepatic duct
C. Common bile duct
D. Splenic duct
E. Pancreatic duct - ANS-Splenic duct
\All of the following would aid in reducing scan time EXCEPT:
A. Increasing parallel imaging factor
B. Reduction in ETL
C. Reduction in NEX
D. Utilizing the coarsest matrix possible
E. Enabling half-fourier option
F. Reducing TR - ANS-Reduction in ETL
\All of the following yield a higher signal-to-noise ratio EXCEPT:
A. Increase in TR
B. Larger FOV
C. Higher NEX
D. Decrease in ETL
E. Increase in TE
F. Reduction in phase matrix - ANS-Increase in TE
\An adverse reaction or complication caused by treatment from a healthcare professional is
called:
A. Anaphylactic
B. Nosocomial
C. Iatrogenic
D. Idiopathic - ANS-Iatrogenic
\Another term used for "fever" is:
A. Hypothermia
B. Apnea
C. Dystonia
D. Febrile - ANS-Febrile
\As the number of phase encodings is increased from 256 to 512, SNR (signal to noise
ratio):
A. Increases
B. Decreases
C. Doubles
D. Does not change
