E.
Other Specialized Devices
I-5.
SOURCE-TO-IMAGE RECEPTOR DISTANCE
A.
Focal Spot Localization (when x-ray
tube is replaced)
B.
SID indicators
2.
1.
Accuracy of numerical indicators
3.
Accuracy of detents
C.
Accuracy
of
tape measure
Mobile or portable SSD accuracy
I-6.
RADIATION BEAM RESTRICTORS AND LIGHT LOCALIZERS
X-ray Field/Light Field Congruence (at least
A.
B.
C.
D.
annually or after removal of collimator)
2.
1. Large cassette
Small cassette
X-ray Field/Cassette Tray Alignment (at least
annually or after repair to alignment light)
X-ray Field/Numerical Indicator Accuracy (at
least annually or after repair to collimator
blades or dial indicators)
2.
1. Large cassette
Small cassette
Positive
Beam Limitation
(PBL) System (at
least annually or after repairs to cassette
tray or
collimator
drive
motors
or
electronics)
1.
Table cassette holder
a. Small cassette
b.
Large cassette
c. Key override function
d. Auto return from manual reduction
e. Repeat a-d for other clinically used
SIDs
2.
Wall Cassette Holder
a. Small cassette
b.
Large cassette
c. Key override function
d.
Auto return from manual reduction
e. Repeat a-d for all clinically used
SIDs
I-7.
PRIMARY RADIATION BEAM CHARACTERISTICS
A.
Half Value Layer at Specified
kVp
(at least
annually or after replacement of X-ray tube,
generator recalibration, or filter thickness
change)
B.
Appropriate
Type of
Added
Filter on
Mammographic Units
C.
Radiation Output:
mR/mAs at specified kVp,
total filtration, and distance from focal spot
20
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