Test your basic knowledge |

Radiology 2

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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. When interpreting radiographs - you notice a radiopaque extension or spur off the proximal surface of #30. What do you think this is?






2. According to principles of shadow casting - How should the central beam be directed






3. What happens in the fixer






4. How many impulses are in .25 seconds






5. What is added filtration






6. What is thermionic emission






7. What causes missing apices






8. if the source-object distance is cut from 16 to 8 - What must be changed to compensate






9. When viewing a periapical radiograph - you notice that the image of the tooth is extremely long and well defined; However the apices are missing. What technique was used to take the radiograph? What caused the roots to appear long?






10. which radiographic technique records the most accurate image of crowns - roots - and supporting structures in a selected area?






11. Max. centrals anatomy






12. What is the maximum size of the x-ray beam at the patients face






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






14. Max lat. canine anatomy






15. What is the x-ray at the center of the primary beam called






16. How long is the final rinse






17. What would cause a film to be too light






18. What happens in the developer






19. What is used to clean the screens inside of a cassestte






20. What causes teeth to appear very short and distorted






21. You process a set of BW's in the automatic processor. three of the BW's are of good quality - but fourth is completely blank. What probably caused this?






22. How are indirect exposure films exposed






23. What type film is faster - intraoral or extraoral






24. In the darkroom - you unwrap a film and place a coin on top of the film for several minutes. when you process the film - you notice a slight - well-defined white circle on the film. What does this mean?






25. How often should developing solutions be changed






26. How are x-rays formed in the tubehead






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






28. Proper patient positioning for bisecting






29. What anatomical structures appear radiolucent on a dental radiograph






30. when viewing a radiograph - the tooth looks normal in size and shape; However - there is a large blank space at the incisal edge and the apices are missing. What caused this error






31. What is formed when high speed electrons strike the target






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






33. What looking at a PANO What causes a big smile






34. Mand lateral/canine anatomy






35. Max premolar anatomy






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






37. you notice that a radiograph taken several months ago is brown and spotted. What happened






38. you change you kVp from 90 to 70 and leave all other factors the same. What is the result






39. Size film used for PA's on small children






40. What types of cells must be effected in order for mutation to occur






41. 3 film holding devices used for paralleling






42. How much total filtration is required of x-ray machines that operate lower than 70 kVp






43. What is the purpose of collimation






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






45. What 2 unites are used to measure absorption






46. What size bulb is used in safelight






47. What are occlusal radiographs used to diagnose






48. What is the earliest sign of radiation exposure






49. How long are films fixed






50. you process four BW films. three of the films appear normal - but one is clear. What happened