30 Question RT quiz

1. The quantitative measure of film blackening is referred to as:

2. The ability of a material to block or partially block the passage of X-rays and gamma rays is referred to as:

3. The developer solution is:

4. When sharp, black, bird-foot shaped marks which are known not to correspond with any discontinuities appear at random on radiographs, they are probably caused by:

5. Which is a disadvantage of using an isotope?

6. The sharpness of a radiographic image is determined by?

7. The most commonly used target material in an X-ray tube is:

8. Low voltage X-ray tubes are generally fitted with windows made of:

9. The main factor that determines the penetrating ability of an X-ray beam is?

10. Film selection for an X-ray exposure depends on:

11. Films that are left between lead screens too long in a high-temperature and high-humidity atmosphere may:

12. Which of the following isotopes has the longest half-life?

13. In an X-ray tube, the filament and focusing cup are the two essential parts of the:

14. The greys and blacks in a radiographic image are composed of:

15. Two factors which greatly affect the suitability of the target material in an X-ray tube are:

16. While using an Isotope the operator may vary.

17. A light image of a backing "B" on a processed radiograph is probably caused by:

18. In million-volt radiography, filtration at the tube:

19. With respect to quality, what three factors must be considered in selecting a source-to-film distance?

20. Why are isotopes preferred to X-rays?

21. Two isotopic sources of a given strength have two different specific activity values. The source with the higher specific activity value will:

22. X-ray films with large grain size:

23. The specific activity of Cobalt-60 depends on:

24. The absorption of gamma-rays from a given source when passing through a metal is due to:

25. The slope of the characteristic curve of a radiographic film is called:

26. Subject contrast is affected by:

27. Constant agitation of the developer during the development process by means of mechanical stirrers or circulating pumps may:

28. Cobalt-59 becomes Cobalt-60 when it is placed in a nuclear reactor where it captures:

29. For a given change in the radiation exposure, film contrast is the inherent ability to show:

30. Which of the following technique variables is most commonly used to adjust subject contrast?

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