WorksheetsQA/QC Practice Questions
Total questions: 30
Worksheet time: 23mins
Name
Class
Date
1.
The greater the OID, the ____________ the image sharpness.
a)
greater
b)
lesser
2.
What property is defined by chemicals having the ability to absorb x-rays and instantaneously emit light?
a)
intensity
b)
fluorescence
c)
phosphor density
d)
emission
3.
What is the proportional difference between two adjacent densities?
a)
contrast
b)
gray scale
c)
fog
d)
recorded detail
4.
What type of gray scale is illustrated here?
a)
long scale
b)
short scale
5.
mAs is the major factor in controlling radiographic contrast
a)
true
b)
false
6.
When dealing with film-screen the degree of blackening is referred to as _____________.
a)
gray scale
b)
exposure factors
c)
contrast
d)
density
7.
A rare earth intensifying screen emits what color when exposed?
a)
blue-green
b)
blue-violet
c)
yellow-green
8.
If the mA is decreased how will the brightness of the intensifying screen be affected?
a)
glows brighter
b)
glows less
c)
does not affect brightness
9.
Computed radiography displays less shades of gray than film-screen.
a)
true
b)
false
10.
What is the primary objective of a Quality Assurance program?
a)
strong support system
b)
decrease liability
c)
enhance patient care
11.
When measuring the accuracy of SID what is the variance that is allowed?
a)
+ or - 2
b)
+ or - 3
c)
+ or -5
d)
+ or -6
12.
What is involved in the Quality Control of X-ray equipment?
a)
Visual Inspection
b)
Performance Testing
c)
Environmental Testing
d)
All of the Above
13.
The Quality Management program came about due to what organization?
a)
ARRT
b)
ASRT
c)
OSHA
d)
The Joint Commission
14.
What is the most effective method of reducing patient exposure?
a)
high seconds low mA
b)
high mA low kVp
c)
high kVp and low mA
d)
shielding
15.
Performing a radiographic exam PA opposed to AP reduces the radiation dose.
a)
True
b)
False
16.
What is utilized to minimize occupational exposure with radiation?
a)
distance
b)
shielding
c)
time
d)
all of the above
17.
High kVp produces a short gray scale.
a)
true
b)
false
18.
The 15% rule states that an increase in kVp by 15% is equivalent to doubling the mAs .
a)
true
b)
false
19.
Which individual is responsible for ensuring a continuous QC program is being completed and is completed on all new imaging equipment when installed?
a)
director of imaging
b)
medical physicist
c)
QC technologist
d)
staff technologist
20.
Digital Radiography cassettes are highly sensitive to background radiation and scatter.
a)
true
b)
false
21.
The pixel bit depth determines the image’s:
a)
brightness.
b)
contrast.
c)
spatial resolution.
d)
contrast resolution.
22.
Overexposing a digital image receptor may result in a quality image, but:
a)
quantum noise will be visible.
b)
the SNR (Signal-Noise Ratio) will be poor.
c)
the ALARA principle has not been followed.
d)
the system will not last as long as expected.
23.
The numerical value indicating the level of radiation exposure to the digital IR is the:
a)
VOI.
b)
histogram.
c)
exposure indicator.
d)
LUT.
24.
Decreasing the window level will result in an image with:
a)
lower contrast.
b)
higher contrast.
c)
decreased brightness.
d)
increased brightness.
25.
This post processing technique reduces the visibility of image noise.
a)
Smoothing
b)
Contrast enhancement
c)
Edge enhancement
d)
Subtraction
26.
Backscatter on a digital image can cause an artifact called a
a)
Phantom image artifact
b)
Moiré artifact
c)
Static artifact
27.
A star pattern is used to measure
a)
focal spot resolution.
b)
intensifying-screen resolution.
c)
SID resolution.
28.
The radiograph illustrated in the figure below was made using a single-phase, full-wave-rectified unit with a timer and rectifiers that are known to be accurate and functioning correctly. What exposure time was used to produce this image?
a)
1/10 second
b)
0.05 second
c)
1/12 second
d)
0.025 second
29.
A three-phase timer can be tested for accuracy using a synchronous spinning top. The resulting image looks like a:
a)
series of dots or dashes, each representative of a radiation pulse
b)
solid arc, with the angle (in degrees) representative of the exposure time
c)
series of gray tones, from white to black
d)
multitude of small, mesh-like squares of uniform sharpness
30.
To ensure proper operation of the digital image display monitor, all of the following are important in order to develop a quality control (QC) program, except:
a)
Routine quality control tests by the QC technologist
b)
Disassembly and cleaning of the internal monitor control devices by the QC technologist
c)
Periodic review of the QC program by a qualified medical physicist
d)
Annual and post-repair medical physics performance evaluations
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