D. IS cleaning & E. Film-screen contact test

monthly and as necessary if artifacts are suspected

Frequency: D. Intensifying screen cleaning

air puffer, lint-free cloth, screen cleaner, and clean, bright workspace

Equipment Required: D. Intensifying screen cleaning

remove loose dirt using a puffer, wipe the screen in circular motion, long vertical strokes, 30 minutes

Cleaning Procedure: D. Intensifying screen cleaning

1. Work in a well-lit environment.

2. blank using a blank

3. Apply screen cleaner sparingly to a lint-free cloth—never pour directly on screen.

4. black , covering the entire surface.

5. Finish with (blank) to remove streaks.

6. Wipe dry with a clean, dry lint-free cloth.

7. Leave the cassette open to air dry for blank

8. Inspect for any remaining smudges or particles

Annually and as necessary after complaints of unsharpness

Frequency: E. Film/screen contact test

cassette and either a box of paper clips or a fine wire mesh

Equipment Required & Test Tool: E. Film/screen contact test

35x43 cm

wire mesh: size

1-2 cm square hole

wire mesh: hole

10 cm from one edge

the square hole is located approximately

lead marker

use a (blank) if the cassette lacks a lead identification area

150 cm to minimize geometric unsharpness, 100 cm

Procedure:  E. Film/screen contact test

1. Load the cassette with a new film.

2. Place the cassette face-up on the radiographic tabletop.

3. Cover the cassette with the test tool (evenly distribute paper clips if using them).

4. Set a focus-to-film distance (FFD or SID) of blank to blank

• Light Beam Alignment: blank

5. Collimate to fully cover the cassette.

6. Place a lead marker at one corner (if needed for orientation).

7. Make an exposure using:

• 50 kV

• 6 mAs

• This should produce a film density of approximately 1-2

8. Process the film.

50 kV and 6 mAs

Procedure: E. Film/screen contact test

1. Load the cassette with a new film.

2. Place the cassette face-up on the radiographic tabletop.

3. Cover the cassette with the test tool (evenly distribute paper clips if using them).

4. Set a focus-to-film distance (FFD or SID) of 150 cm to minimize geometric unsharpness.

• Light Beam Alignment: 100 cm

5. Collimate to fully cover the cassette.

6. Place a lead marker at one corner (if needed for orientation).

7. Make an exposure using

• blank

• blank

• This should produce a film density of approximately 1-2

8. Process the film.

blurring in any region and high-density areas

Evaluation: E. Film/screen contact test

1-2 OD

OPTICAL DENSITY: E. Film/screen contact test

measure density at the square hole in the test tool to confirm consistency

If a densitometer is available:

warped cassette, loose foam packing, and air packets or misaligned screens

causes of poor contact may include: