LMRT CORE REVIEW TEST
QUESTIONS WITH
CORRECT ANSWERS
the ability of the grid to remove scatter increases - Answer-As the lead content of a grid
increases
grid cut-off - Answer-Angulation across the long axis of a linear grid causes
Potter-Bucky diaphragm - Answer-A device that moves the grid during a radiographic
exposure is called a
perpendicular - Answer-A potter-bucky diaphragm must move the grid in a direction that
is_ to the direction of the grid lines
the use of reusable receptors - Answer-Digital radiography (DR) is characterized by
binary machine - Answer-Computers operate using a_ language
bit - Answer-Each binary # is called a
byte - Answer-An eight-bit word is called a
RAM - Answer-When the main power to the computer is turned off,_ is erased
mouse - Answer-Which computer device does not store memory?
amorphous silicon - Answer-Indirect DR uses_ as the detector material
laser scanning a PSP plate - Answer-CR systems acquire clinical information by
brightness - Answer-The window level controls
image density - Answer-The window width controls
pixel - Answer-Resolution is controlled by_ size
, thin film technology (TFT) - Answer-A common feature between indirect & direct DR
technology is
matrix - Answer-Computerized digital images consist of a_ of picture elements, each
w/a video display value or gray shade
electronic address - Answer-Each pixel in a digital display matrix is located according to
its
3,145,728 - Answer-A matrix of size 2048 x 1536 would have_ pixels
4 - Answer-If the digital FOV is 1024 & the display matrix is 256, the pixel size would be
pixel size - Answer-In digital imaging, the limiting factor in spatial resolution is the
256 - Answer-A pixel that has an 8-bit depth displays_ shades of gray
3 mm renal calculi (stone) - Answer-Which of the choices below would produce the
highest spatial frequency & contrast?
manual processing - Answer-All of the following are related except one?
exposure index & values of interest (VOI) - Answer-In digital imaging processing, the
digital data set is arranged into a histo-graph distribution in order to determine the
Apply a predetermined scale of contrast to the digital data set - Answer-The purpose of
a LUT is to
Is direct w/matrix size & indirect w/pixel size - Answer-The relationship b/w digital image
resolution
MRI - Answer-Of the many types if digital image procedures performed in a
contemporary medical imaging dept, the largest file sizes are typically generated by
Compares entrance dose to the detector to a reference industry-standard target dose -
Answer-The deviation index (DI)
Exposure to the IP of 1 mR - Answer-An S value of 200 represents a/an
An EI # increase from 1500-1800 - Answer-When changing exposure technique from 9
mAs to 18 mAs using computed radiography, the radiographer
A loss of contrast - Answer-Grossly overexposed digital images will demonstrate
Repeating an image w/an S # of 210 b/c of exposure technique - Answer-Of the choices
below, the greatest ALARA violation would be
QUESTIONS WITH
CORRECT ANSWERS
the ability of the grid to remove scatter increases - Answer-As the lead content of a grid
increases
grid cut-off - Answer-Angulation across the long axis of a linear grid causes
Potter-Bucky diaphragm - Answer-A device that moves the grid during a radiographic
exposure is called a
perpendicular - Answer-A potter-bucky diaphragm must move the grid in a direction that
is_ to the direction of the grid lines
the use of reusable receptors - Answer-Digital radiography (DR) is characterized by
binary machine - Answer-Computers operate using a_ language
bit - Answer-Each binary # is called a
byte - Answer-An eight-bit word is called a
RAM - Answer-When the main power to the computer is turned off,_ is erased
mouse - Answer-Which computer device does not store memory?
amorphous silicon - Answer-Indirect DR uses_ as the detector material
laser scanning a PSP plate - Answer-CR systems acquire clinical information by
brightness - Answer-The window level controls
image density - Answer-The window width controls
pixel - Answer-Resolution is controlled by_ size
, thin film technology (TFT) - Answer-A common feature between indirect & direct DR
technology is
matrix - Answer-Computerized digital images consist of a_ of picture elements, each
w/a video display value or gray shade
electronic address - Answer-Each pixel in a digital display matrix is located according to
its
3,145,728 - Answer-A matrix of size 2048 x 1536 would have_ pixels
4 - Answer-If the digital FOV is 1024 & the display matrix is 256, the pixel size would be
pixel size - Answer-In digital imaging, the limiting factor in spatial resolution is the
256 - Answer-A pixel that has an 8-bit depth displays_ shades of gray
3 mm renal calculi (stone) - Answer-Which of the choices below would produce the
highest spatial frequency & contrast?
manual processing - Answer-All of the following are related except one?
exposure index & values of interest (VOI) - Answer-In digital imaging processing, the
digital data set is arranged into a histo-graph distribution in order to determine the
Apply a predetermined scale of contrast to the digital data set - Answer-The purpose of
a LUT is to
Is direct w/matrix size & indirect w/pixel size - Answer-The relationship b/w digital image
resolution
MRI - Answer-Of the many types if digital image procedures performed in a
contemporary medical imaging dept, the largest file sizes are typically generated by
Compares entrance dose to the detector to a reference industry-standard target dose -
Answer-The deviation index (DI)
Exposure to the IP of 1 mR - Answer-An S value of 200 represents a/an
An EI # increase from 1500-1800 - Answer-When changing exposure technique from 9
mAs to 18 mAs using computed radiography, the radiographer
A loss of contrast - Answer-Grossly overexposed digital images will demonstrate
Repeating an image w/an S # of 210 b/c of exposure technique - Answer-Of the choices
below, the greatest ALARA violation would be
