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Imaging Final Test

Enter the letter for the matching Answer
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1.
Larger matrix= smaller pixels=improved sharpness
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2.
which major technical component of a digital radiography system refers to the collection of X-rays transmitted through the patient
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3.
Photostimulable phosphors have the property of creating and storing a _____ when exposed to X-rays
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4.
____ produce(s) lateral spreading of light, which destroys the spatial resolution of the image.
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5.
______ is a photoconductor that conducts electrons when struck by light or X-ray photons
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6.
DR is characterized by
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7.
what does X-ray exposure of the PSP IP create
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8.
Have a thick phosphor layer, absorbs more radiation, have faster speeds High speeds= low resolution
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9.
Have thinner layers of phosphor, provide sharper images, used when small detail is critical Slower speed= high resolution
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10.
reducing KVP using a grid and increasing collimation all reduce the production of scattered radiation
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11.
Exposure latitude is to conventional radiography as ____ is to DR
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12.
the exposure indicator number is an
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13.
grossly overexposed digital images will demonstrate
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14.
the window width controls
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15.
the window width
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16.
CR systems acquire clinical info by
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17.
the purpose of a LUT is to
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18.
Four primary steps in CR
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19.
The digital detector used in CR Imaging is the
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20.
computerized digital images consists of a ____ of picture elements, each with a video display value or gray shade
A.
Image acquisition Image plate scanning and then erasure Image processing Image display
B.
powdered phosphors
C.
Laser scanning a PSP plate
D.
image contrast
E.
latent image
F.
the use of a reusable receptor
G.
matrix
H.
Dynamic range
I.
Imaging plate
J.
High resolution IPS
K.
apple a predetermined scale of contrast to digital data sets
L.
Latent image
M.
a loss of contrast
N.
false
O.
selenium
P.
indication of radiation absorbed by the imaging plate
Q.
data acquisition
R.
decreases contrast and increases grays
S.
true
T.
Standards resolution IPS
Type the Answer that corresponds to the displayed Question.
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21.
digital images are less sensitive to scattered and background radiation
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22.
computerized digital images consist of a _____ of picture elements, each with a video display value or gray shade
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23.
The flat-panel TFT digital detector uses complex and sophisticated electronic circuitry to read out the electrical charges produced and stored in the matrix array.
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24.
the LUT is selected by the operator when a procedure is entered at the console
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25.
in digital imaging the limiting factor in spatial resolution is the
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26.
A(n) ____ indicator is a numerical parameter used to monitor the radiation exposure to the IP in CR Imaging
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27.
In the past, gas lasers such as a helium-neon laser were used, however, current CR readers use solid state laser diodes that emit a red laser beam having wavelengths of about 670-690nm
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28.
When the electron is in the F Center it is at this point when the electrons are spatially distributed and create a _____ image
Type the Question that corresponds to the displayed Answer.
incorrect
29.
Immediate emission of light
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30.
Delayed emission of light

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