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Rad135 Final Exam Review- Part 6
Test Description: This content covers several chapters from the text to help you prepare for the final exam in Rad135.
Instructions: Answer all questions to get your test result.
1) Computerized storage and transmission systems for digitized images of all types are called ____.
A
DSR
B
RIS
C
LIH
D
PACS
2) In diagnostic radiology, radiographic image contrast is principally due to the predominance of ____.
A
Bremsstrahlung interactions
B
compton interactions
C
coherent interactions
D
photoelectric absorption interactions
3) The edge distortion problem seen in image intensification tubes is called ____.
A
vignetting
B
penumbra
C
minification
D
magnification
4) When x-ray photons interact with matter and change direction, the process is called ____.
A
absorption
B
interpolation
C
transmission
D
scatter
5) When the x-ray emission spectra between single and three phase generators are compared ____.
A
The keV of the characteristic spike would be significantly shifted to the right with the single phase generator
B
three phase beams would have higher average energy and higher amplitude
C
less exposure would be required for the same part thickness, using single phase
D
The spectrum for a single phase beam will have a higher amplitude and a slight shift to the right
6) Electrical potential (EMF) is measured in ____.
A
volts
B
coloumbs
C
joules
D
amps
7) Most AEC's utilize ___ ion chambers in various combinations.
A
one
B
four
C
three
D
two
8) If a chest radiograph requires 4 mAs at 72, the new mAs to use at 56 would be ____ mAs.
A
1.5
B
2.4
C
1.8
D
3
9) The efficiency of x-ray production is ____ the tube current.
A
strongly affected by
B
unaffected by
C
directly proportional to
D
indirectly proportional to
10) The main purpose of filtration is to reduce ______.
A
HVL
B
noise
C
beam penetrability
D
patient dose
*select an answer for all questions
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