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Imaging Final Test

Enter the letter for the matching Answer
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1.
DR is characterized by
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2.
Grossly overexposed digital images will demonstrate
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3.
an eight bit word is called a
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4.
with indirect flat panel TFT digital detectors, what is used to first convert X-ray photons into light photons?
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5.
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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6.
what does X-ray exposure of the PSP IP create
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7.
a digital image is composed of a series of rows and columns known as a matrix
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8.
each binary number is called a
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9.
if the digital FOV is 1024 and the display matrix is 256 the pixel size would be
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10.
the window width
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11.
Computed radiography is also referred to as
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12.
When changing exposure technique from 9 mAs to 18mAs using CR, the radiographer should expect
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13.
The purpose of the barcode label is to match the image information with the:
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14.
_____ is the max range of pixel value a computer, display monitor, or other digital device can store
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15.
A(n) ____ indicator is a numerical parameter used to monitor the radiation exposure to the IP in CR Imaging
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16.
PSL
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17.
The phosphor layer is made of the phosphors from the _____ family
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18.
____ produce(s) lateral spreading of light, which destroys the spatial resolution of the image.
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19.
CR systems acquire clinical info by
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20.
while flat panel indirect detectors use a photodiode, direct detectors use
A.
Imaging plate
B.
bit
C.
laser scanning a PSP plate
D.
Barium fluorohalide
E.
PSP
F.
Low contrast
G.
decreases contrast and increases grays
H.
4
I.
scintillator layer
J.
true
K.
No change
L.
latent image
M.
bit depth
N.
powdered phosphors
O.
the use of a reusable receptor
P.
True
Q.
Exposure
R.
Photostimulated luminescence
S.
photoconductor
T.
byte
Type the Answer that corresponds to the displayed Question.
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21.
given the negative feedback due to underexposures, what does a predictable and unfortunate use of higher exposures result in
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22.
which layer used in the indirect flat panel digital detector is usually either cesium iodide or gadolinium oxysulfide?
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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.
Which describes the ability of the imaging system to resolve fine details present in an object?
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25.
which of the following is a photoconductor that conducts electrons when struck by light of X-ray photons
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26.
When the electron is in the F Center it is at this point when the electrons are spatially distributed and create a _____ image
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27.
Computers operate using a ______ language
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28.
Which of the following reduces the output image from the scintillator phosphor to the size of the CCD array?
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29.
1MR= 200 Ideal is100-400 Double #, double exposure
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30.
which image quality descriptor of a digital image is related to the size of the pixels in the image matrix

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