Extraoral Processing Guidelines

Extraoral Film Processing Guidelines

Correct processing contributes to the quality of a radiograph and cannot be overemphasized. A perfectly exposed x-ray film will not result in a good-quality radiograph if poor manual processing procedures are used. A properly processed radiograph requires only minimal exposure, thus reducing patient exposure.

While automatic processing equipment will mechanically perform many of the procedures done during manual processing, it is important to follow the manufacturer's recommendations for optimal results.

Manual Processing Procedure

1. Prepare developer and fixer solutions according to directions on the containers.



2. Use an accurate thermometer to determine the temperature of the developer solution for the selected film.



3. Carefully attach film to the film hangers.



4. Set the timer according to the chart for the developer temperature.



5. Immerse the film (attached to film hanger) quickly into the developer solution, dislodging air bubbles by vigorously moving the film hanger in the solution for 5 seconds.



6. Do not agitate film during development.



7. Remove the hanger from the developer when the timer sounds. Drain the excess developer into the water bath; do not drain it back into the developer tank.



8. Immerse the hanger rapidly into the water rinse tank. Agitate continuously during the water rinse procedure.



9. Place the hanger in the fixer solution. Intermittent agitation (5 seconds every 30 seconds) should be used throughout the fixing procedure. Excess fixer should be drained into the water bath rather than back into the fixer tank.



10. Place the hanger in the wash tank; wash in clean running water.



11. Dry at room temperature in a dust-free area or suitable drying cabinet, temperature should not exceed 120•F (49•C).



12. Replenishment: add 8 ounces of the appropriate replenisher (236 mL) per one gallon (3.8 L) of developer and fixer working solutions each day even if no film is processed in the chemicals.

*If you cannot identify your processor's cycle time, refer to the equipment manufacturer for more information. Processing times and temperature will vary based on the processor. These values are only guidelines.