1-9
Adjustment Method 2
1. Place loaded cassette (14 17 inches (35.56 x 43.18 cm) suggested) on floor diĆ
rectly beneath collimator.
2. Set SID to 40 inches.
3. Set collimator for 8 10 inches.
4. Turn on field lamp.
5. Place lead strips at each corner of light field to demark size of field. See IllustraĆ
tion 1-7.
6. Expose film. Do not move film cassette.
D 60 kVp, 2 mAs.
7. Open collimator blades.
8. Expose film a second time and develop the film.
D 60 kVp, 2 mAs.
This exposure should include the lead strips marking the corners of the light
field. See Illustration 1-7. If the lead strips do not show, reload the cassette
and repeat steps 1 though 8 but open the collimator blades in step 7 far
enough to include the lead strips.
ILLUSTRATION 1-7
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