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Radiology 2

Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. How is vertical angulation established with the bisecting technique






2. What causes a HERRINGBONE effect






3. What exposure would be useful in identifying salivary stones in the submandibular gland






4. How does exposure time for edentulous patients compare to dentulous patients






5. List the properties of x-rays






6. What 3 types of cells are most radioresistant






7. What anatomical structures appear radiolucent on a dental radiograph






8. 3 film holding devices used for bisecting






9. What are three types of image receptors used in digital radiography






10. A properly exposed film appears completely black. when was is exposed to white light






11. What is the purpose of taking radiographs of an edentulous patient






12. How does the reproductive capacity of a cell correlate with radiosensitivity






13. How far from the work surface must the safelight be mounted






14. What is the purpose of filtration






15. How far should the operator stand from the source of radiation






16. using a 16 inch cone focal-film distance - the diameter of the beam measured at the patient's face should be no larger than






17. What exposure is taken to determine jaw relationships in ortho treatment planning






18. When mounting dental radiographs - What is the best way to differentiate max and mand films?






19. How long does the first rinse last






20. when processing - two films overlap in the developer - but not in the fixer. How would the films appear






21. Your dentist asks you to take a FMS on a 65 yr old edentulous patient. How many exposures will you take? which exposures are not necessary? What intraoral technique will you use? What might be better than a FMS?






22. What causes foreshortening






23. When using D speed film - you use 50 impulses of radiation. How many impulses would you use with E speed film?






24. What would cause a properly exposed film to appear dark?






25. When interpreting radiographs - you notice a radiopaque extension or spur off the proximal surface of #30. What do you think this is?






26. when mounting a film the dot is convex - On What side of the mouth would you find #32?






27. What radiograph is used to sHow contrast in soft tissues






28. What Size film is 1 1/4 x 1 5/8






29. What causes overlapping






30. What is the optimum processing temp.






31. What part of the x-ray machine helps remove heat






32. What are the 2 units used to measure exposure to radiation






33. What type of film are calcium tungstate screens paired with






34. Max lat. canine anatomy






35. What is the best method of reducing radiation to the patient






36. What is scatter radiation






37. What is the most likely cause of a film with very poor definition






38. What parts of the x-ray machine are included in the anode circuit






39. when viewing a PANO - you notice that the right TMJ is magnified - bu the left TMJ is normal. What caused this error






40. You notice on a PANO that the ant. teeth appear narrow and out of focus. What caused this






41. What speed films are most commonly used?






42. On a mandibular molar PA - Where is the mylohoid ridge located






43. after processing exposed dental film - you notice dark spots on the film. What caused this






44. which anatomical structures appear radiolucent






45. who discovered x-rays






46. What does alara stand for






47. What part of the x-ray machine is responsible for providing the electrons






48. Size film used for anterior PA's for patients with narrow arches






49. when viewing a PANO - you notice that a lot of spine sHows on both side of the film - What caused this






50. What is a large dose of radiation given over a short period of time







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