| Question |
Answer |
| 1. What is meant by the latent image? |
image on exposed film before processing. |
| 2. What is meant by a visible image? |
exposed, processed film that can be viewed with proper lighting |
| 3. Which film is faster, E or D? |
E |
| 4. What is meant by film speed? |
amount of exposure (time) required to expose the film |
| 5. What determines film speed? |
size/shape of silver halides; thickness of emulsion; radiosensitizing dyes |
| 6. Which part of the film is sensitive to exposure? |
silver halides in the emulsion |
| 7. List all of the things that can expose film. |
x-ray, light, scatter radiation, heat, age, pressure, chemicals, static electricity |
| 8. What happen to the radiographic image if exposed to extraneous light during processing? |
fogged film |
| 9. What is the result of leaving films in the developer too long? |
darker image (higher density image) - may turn completely black |
| 10. What is the result of leaving films in the fixer too long? |
lighter image (lower density image) - film may be completely cleared |
| 11. What is the ideal time and temperature for manual development? |
68 degrees Fahrenheit for 4.5 - 5 minutes |
| 12. What is the total time for fixing films using manual processing? |
10 minutes |
| 13. What is the purpose for rinsing films between developing and fixing? |
remove excess developer and stop the developing process |
| 14. Why are films not rinsed after development in automatic processing? |
rollers remove the developer |
| 15. What are the special qualities of automatic processing chemicals? |
control swelling of emulsion; more concentrated; more preservatives |
| 16. What information should be placed on the rack for manual processing? |
patient name and date of exposure (usually name of prescribing dentist, also) |
| 17. What is a coin test? |
open film; place coin on top; expose to safelight or no light for 5 minutes; process; view |
| 18. What is the purpose of the coin test? |
test for extraneous light exposure |
| 19. What is a step wedge? |
aluminum or other metal of varying thicknesses built in steps |
| 20. How is the step wedge used in a quality assurance program? |
expose quality assurance and checker films to test chemicals |
| 21. What is the purpose for quality assurance of the processing chemicals? |
produce optimal patient radiographs |
| 22. What is replenishment? |
remove some old chemicals; replace with new solutions |
| 23. What is the minimum recommendation for frequency of replenishment? |
daily |
| 24. What is able to expose dental film? |
x-ray, light, scatter radiation, heat, age, pressure, chemicals, static electricity |
| 25. What happens to silver halides during developing? |
exposed ones darken |
| 26. What happens to silver halides during fixing? |
unexposed/undeveloped silver halides are removed |
| 27. How will films be affected if the developing solution is too hot? |
darken |
| 28. How will films be affected if the developing solution is too cold? |
underdeveloped/low density/too light in appearance. |
| 29. What type of darkroom door allows for people to enter and exit without light entering? |
revolving |
| 30. What are the specifications for a safelight that is safe for both intraoral and extraoral film? |
4 feet from work surface; 15 watt bulb; GBX-2 filter |
| 31. How would you test a daylight loading processor for light safeness? |
coin test |
| 32. What type of Kodak film has a purple color on the backside? |
duplicating |
| 33. What is the purpose for lead foil in the film packet? |
absorb backscatter radiation and prevent film fog |
| 34. What is the new speed of film for Kodak film? |
F |
| 35. What would you do to darken the image when making a duplicate film? |
expose it to less light during duplication |
| 36. What are the specifications for film storage? |
50 - 70 degrees Fahrenheit; 30-50% relative humidity; use before expiration date |
| 37. What does it mean when an image results from a coin test film? |
light exposure has occurred |
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