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Digital QA And Artifact Test Review: #4
Test Description: Image Artifacts
Instructions: Answer all questions to get your test result.
1) The technologist should clean the CRT:
A
yearly
B
this is not a required system inspection activity
C
weekly
D
montly
2) Weekly technologist (or QC tech) responsibilities should include:
A
ensuring CR cassettes are erased
B
ensuring IPs are clean
C
all of these
D
inspecting the hinges and latches of CR cassettes
3) Service personnel should fix broken hinges of a cassette.
A
False, it should be disposed of
B
False, anyone can fix it
C
True
4) Dirt/ dust or fingerprints on the laser printer could:
A
be mistaken for pathology
B
can interfere with image quality
C
all of these
D
could lead to a false positive diagnosis
5) If artifacts are detected by the technologist, he or she should:
A
just wait and see if it happens again
B
get to it when convenient
C
report it immediatly
D
ignore it
6) Cracks in the IP of a CR cassette:
A
will look like double exposed images
B
will not affect the image
C
can appear as areas of lucency on the image
D
can lead to a grainy, noisy image
7) It is acceptable to place more than one image on one CR plate.
A
True
B
False, as this can complicate the processing procedure
8) What causes the 'halo' effect in digital imaging ?
A
too much edge enhancement
B
low mA
C
using a high frequency grid
D
using a low frequency grid
9) Which of the following areas can be associated with artifacts ?
A
CR plate reader
B
imaging plate
C
image printer
D
all of these
10) The halo effect is often noticed:
A
with low frequency grids
B
with prosthetic devices
C
with low mA imaging
D
when a cassette is used backwards
11) Which of the following can lead to image artifacts ?
A
tape
B
using a cassette backwards
C
kinks/ bends in an IP
D
all of these
12) Using too low of mA settings results in:
A
poor contrast
B
acceptable images due to post-processing functions
C
artifact lines
D
noisy images
13) How does the Moire pattern occur ?
A
only in DR imaging
B
in CR imaging, when the grid frequency and scan frequency are perpendicular to each other
C
it is a post-processing issue, but can be fixed without re-exposing the patient
D
in CR imaging, when the grid frequency and scan frequency are similar
14) Incorrect IP erasure
A
will not affect the image
B
can lead to blurry images
C
is impossible
D
can lead to phantom images
15) Dirt / dust within the CR reader can:
A
will not affec the image
B
cause horizontal white lines
C
cause wavy lines
D
cause dark lines
16) If a cassette is placed too close to a heat source
A
it will have a bright, linear area
B
it will not be affected
C
it will have a dark, blurry area
D
it will have sharp thick lines
17) Grids are needed in digital imaging
A
grids are actually NOT needed as much with digital imaging
B
all of these
C
because there is no issue of grid cut off
D
as digital is affected by scatter
18) The intermittent appearance of extraneous line patterns can be caused by problems in the electronics of the plate reader.
A
False
B
True
19) Severe alterations of image contrast can be from:
A
low mA
B
post processing errors
C
grid lines matching laser scanning pattern
D
malfunction of CR rollers within reader
20) Improper algorithm recognition can be from:
A
two exposures on one IP
B
all of these
C
diagonal collimation
D
lead aprons in light field
*select an answer for all questions
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