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Digital Imaging 4 Test

Enter the letter for the matching Answer
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1.
The accuracy of the Exposure indicator is influenced by __________ ___________ recognition along with unexpected structures in the __________ ___________.
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2.
A dirty light guide will cause dirt to block the plate's _________ through the light guide to the ________________ tube and to the ______.
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3.
The current recommendation is to record ____ image per receptor to avoid __________ _________ errors.
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4.
What is the predominate cause of blur in radiographic images?
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5.
The size of the image receptor affects the size of the __________ __________ but should not be confused with magnification of the image by changes in _________ and _________.
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6.
Gross overexposure involves the use of excessive ____________.
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7.
The Wavy appearance that runs across the entire image caused because the laser or plate was disturbed during processing is considered a ____________ artifact.
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8.
Blurred images are caused by what?
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9.
The radiographic density of a lumbar spine radiograph is too low. What are the possible causes of this image to have insufficient density?
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10.
Shape distortion is caused by a change in the ____________ relationship between the ________, the __________ and the __________ ___________.
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11.
A Wavy appearance that runs across the entire plate is an artifact caused because the ___________ or ___________ was disturbed when the ____________ was being read or processed.
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12.
Selecting the incorrect histogram model for analysis can cause the _________ _____ _________ to display incorrect ___________ and __________.
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13.
Exposure Field Recognition Errors can cause a _______________ error during the ___________ analysis because the ___________ ____________ weren't recognized and all of the data on the PSP plate were included in the values distribution.
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14.
Improper brightness in a digital image can be caused by (give 3)
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15.
The PSP plate in a cassette-based image receptor can get _________ or __________ during processing which can cause artifacts. The chemicals used to clean the plate can also _________ the cassette.
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16.
_________ and ________ are responsible for image Size distortion because they affect the distance between the ___________ of interest and the ___________ _________.
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17.
When blur is caused by geometric factors what is the best way to assess these factors?
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18.
Quantum noise in digital images is caused by __________ ___________ ________.
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19.
When the exposure absorbed by the Image Receptor surpasses the level the receptor can respond to what happens?
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20.
Excessive Radiation is defined as:
A.
Motion or changes in geometric factors during image production.
B.
Using specific test phantoms
C.
1; Data analysis
D.
Reaches a Saturation Point and all pixels values are raised to their maximum level
E.
Radiation
F.
Exposure Field; Exposure Field
G.
Look Up Table; Brightness and Contrast
H.
Scratched or Bent; Stain
I.
Insufficient Signal Strength
J.
Image display; SID and OID
K.
Rescaling; Histogram; Field Borders
L.
Signal; Photomultiplier; ADC
M.
1)Decreased kVp; 2)Insufficient mAs; 3)Slower than expected speed receptor; 4)Less processing time; 5)Developer temp too low; 6)Decreased chemical concentration
N.
SID and OID; Object of interest and the image receptor
O.
Motion
P.
1)Scatter Radiation; 2)Unrecognized exposure field borders; 3)Overexposure
Q.
Angular; Tube; Part; Image Receptor
R.
Processing Artifact
S.
Laser; Plate; Plate
T.
More than 3 to 4 times the level of radiation needed to produce a diagnostic quality image
Type the Answer that corresponds to the displayed Question.
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21.
Grid Cutoff will reduce the demonstrated ______________ of the image regardless of the receptor used.
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22.
Most image blur is caused by ___________ _________.
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23.
A chest radiograph was produced using an appropriate kVp and mAs value, if a lead apron was included in the exposure field there would be an error in the ___________ ____________.
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24.
Cassette-Less artifacts can occur because of malfunction of a single ________ or multiple rows of _________.
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25.
Since Cassette-Less imaging systems are sealed, ________ and ________ are less likely to cause artifacts.
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26.
Most Digital Artifacts appear ___________.
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27.
If an Artifact runs along the entire axis and appears on every image it most likely a ________________ Artifact.
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28.
If an artifact does not run along the entire axis and does not appear on every image it is most likely a __________ Artifact.
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29.
Cassette-Based PSP artifacts occur because each time a cassette is processed the plate reader moves the _________ _________ in and out of the cassette which can cause dust and dirt to get in the cassette.
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30.
Improper alignment of a radiographic grid in Digital Imaging can lead to __________ __________.

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