OEC 9800 Periodic Maintenance Procedure
42
Radiographic Beam Alignment Test
Film Exposure
The Radiographic Beam Alignment Test requires the exposure and development of a film. Record all measurements
taken in this procedure on the PM Form.
WARNING
:
The following steps produce X-rays. Use appropriate safety precautions.
1.
To nominalize C-Arm flexure, release the C-Arm brake and position the C-Arm at 45
°
.
2.
Attach the Beam Alignment Tool on the Image Intensifier.
3.
Load a film cassette in the Beam Alignment Tool.
4.
Make the following four exposures on one sheet of film:
5.
Select
Manual - Fluoro, Normal field
and then
Film
mode. Take a 55 KVp @ 1.5 mAs exposure.
6.
Select
Manual - Fluoro, MAG 1 field
and then
Film
mode
.
Take a 55 KVp @ 1.5 mAs exposure.
7.
Select
Manual - Fluoro, MAG 2 field
and then
Film
mode. Take a 55 KVp @ 1.5 mAs exposure.
8.
Select
Manual
-
Fluoro
and completely close the collimator iris. Select
Film mode
. Take a 55 KVp @ 1.5 mAs
exposure.
9.
Remove the film cassette and develop the film.
50 mm x 50 mm Field Verification
1.
Verify the 50 mm x 50 mm exposure is within the 50 mm square in the middle of the beam alignment tool. If a stop
sign pattern is displayed, measure the image from the center of the flats.
2.
Place a check mark in the PM Form checkbox if it passes.
