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Chapter two final Test

Enter the letter for the matching Answer
incorrect
1.
Controlling Factors of Contrast
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2.
Effective dose high
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3.
Noise
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4.
off focus grid
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5.
Image quality factors for radiograph images
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6.
off center grid
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7.
"s" number
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8.
Roentgen (R)
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9.
Controlling Factors for Brightness
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10.
Off level grid
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11.
SNR
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12.
Accurate Collimation
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13.
Brightness
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14.
Adjusting Film density
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15.
bit depth
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16.
Pixel size
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17.
Exposure time (ms)
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18.
Image Quality Factors for Digital
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19.
Density
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20.
PACS
A.
a random disturbance that obscures or reduces clarity
B.
mA's of 25% to 30% to make visual change
C.
the greater the contrast resolution the greater the bit depth
D.
male-AP unshielded hip Female-AP thoracic spin w/o breast shields
E.
the screen
F.
kV higher kV produces lower contrast (less shades of grey) 15% increase in kV will increase film density similar to doubling mA's
G.
acquisition pixel size-minimum size (important one) display pixel size-minimum that can be displayed on monitor
H.
Brightness, Contrast, Resolution, Distortion,Exposure index, Noise
I.
picture archiving communication systems
J.
inversely proportional to radiation that strikes the IR
K.
controls duration of the exposure usually expressed in milliseconds
L.
limiting the size and shape of the x-ray beam to only clinical intrest
M.
the intensity of a light that represents the individual images on a monitor =(similar to density)
N.
radiation exposure in the air measured on rem( radiation protection) rads (patient dose)
O.
amount of "blackness" on the produced radiograph
P.
must be used a certain SID to prevent grid cut off
Q.
Density, Contrast, Resolution and Distortion
R.
CR and grid are not in equal angles
S.
Signal-to-noise ratio high good low bad
T.
the CR is not centered along the center of the axis of the grid
Type the Answer that corresponds to the displayed Question.
incorrect
21.
SEE
Type the Question that corresponds to the displayed Answer.
incorrect
22.
similar to conventional film screen but using digital
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23.
recorded sharpness on the image
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24.
used for body parts 10 com or more
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25.
As low as reasonably achievable
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26.
*frequent exposure*.1 ren (1 mSv) per year not frequent .5 rem (5mSv)
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27.
the difference in density between adjacent areas of radio graphic image
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28.
.05 rem (.5 mSv) per month .5 rem (5 mSv) for gestation period
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29.
misrepresentation of object size or shape as projected onto radiographic recording media
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30.
the difference in brightness light and dark areas of an image

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