One-on-one (full) film adjustment.

(b) Vary the SID of the SFD while observing the fluoroscopic image.

Verify the image size remains the same as in paragraph (3)(a) above and all collimator

blades are visible.

(c) Close the collimator shutter blades to their minimum using the

shutter controls on the SFD. Verify a small square or slightly rectangular image is

displayed. If it is not, adjust "COLL MIN" potentiometer, R22, on the SFD interface

board until the desired image is obtained.

(4) One-on-one (full) film adjustment.

(a) Lower the SFD to its minimum SID. Select the radiographic mode

on the generator. Load an unexposed cassette into the SFD and place the film in the

"park" position. Open the shutter blades to their maximum open position and select the

one on one format.

(b) Make an exposure. Make a radiographic exposure and develop the

film. Measure the exposed area and verify it is between 9.25 inches, x 9.25 inches, and

9.0 inches x 9.0 inches in size. If it is not, adjust the "FULL" potentiometer, R14, on the

SFD interface board to increase or decrease the exposed area as required.

(c) Repeat the procedure if necessary. Repeat this procedure until the

exposed area is within the limits described in paragraph (4) (b) immediately above.

Two-on-one longitudinal film adjustment.

(5)

(a) With the SFD at minimum SID and the radiographic mode selected

on the generator, insert an unexposed film cassette and advance it to the "park"

position. The collimator blades should be set to their maximum open position.

(b) Select the two-on-one longitudinal format and make two radiographic

exposures. Develop the film and measure the exposed areas. The dimensions of each

exposure should be between 9.25 inches x 4.625 inches and 9.0 inches x 4.5 inches

with no more than 3/16-inch gap or overlap between the images. If it is not, adjust

"HALF" potentiometer, R15, on the SFD interface board to increase or decrease the

exposed area as required.

(c) Repeat this procedure until the exposed areas are within the limits

described in paragraph (5) (b) immediately above.

(6)

Two-on-one transverse film adjustment.

(a) With the SFD at minimum SID and the radiographic mode selected

on the generator, insert an unexposed film cassette and advance it to the "park"

position. The collimator shutters should be set to their maximum open position.

MD0351

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