LORAD AFFINITY Series - Figure 4-9 Tubehead Shielding Check

P/N 9-500-0255 4-43
Service Manual
Chapter 4: Calibrations and Performance Checks
Performance Checks
3. Use fixtures to hold the
probe in position with
relation to the tubehead
as shown in Figure 4-9.
Position the probe at loca-
tion “A”. Make sure the
distance between the
probe and the focal spot
(source) is exactly 1 meter
(39 3/8 inches).
4. Apply power, then set the
unit for a Manual mode
exposure at 39 kV, 220
mAs, Large focal spot.
Conduct an exposure and
record the mR reading.
5. Make exposures, using
the same technique fac-
tors, for positions “B”
through “H” (Figure 4-9).
Record each mR reading.
For position “H”, rotate
the C-arm to position the probe directly behind the tubehead. Be sure the distance
between the probe and the focal spot remains exactly one meter for each measurement
position.
Note… Any reading above 100.0 mR/Hour is unacceptable, contact L
ORAD
Technical Support.
Figure 4-9: Tubehead Shielding Check
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