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Radiology 3

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. Primary beam passes through glass window - insulating oil - tubehead seal. 0.5 to 1.0 mm of aluminum






2. Internal ridge of mandible muscle attachment - continuous with internal oblique ridge; radiopaque line






3. Cell damage occurs through formation of 'free radicals'. Free radicals are formed when an x-ray photon ionizes water.






4. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






5. Space between root and the lamina dura - thin - radiolucent line - healthy PDL is uniform thickness






6. U-shaped portion extending from ramus to ramus






7. Depression of bone; submandibular salivary gland found here; radiolucent; below mylohyoid ridge






8. A line of union between adjoining bones - found only in skull; appears as radiolucent line






9. Small lymphocyte - bone marrow - reproductive cells - immature bone






10. Bony wall that divides 2 spaces - radiopaque






11. Do not occur in dentistry






12. The measurement of electrical force that causes electrons to move from a negative pole to a positive one. Measured in volts (V) or kilovolts (kV)






13. Surrounded by genial tubercle - hole in bone near mandibular midline - radiolucent






14. Mature bone - muscle - nerve






15. Superior to internal oblique ridge; anterior border of ramus ends in external oblique ridge; radiopaque band






16. Marked prominence that appears radiopaque.






17. Bump of bone - muscle attachment; lingual aspect of mandible - 'ring shaped' radiopacitiy below mandibular incisors.






18. Tube that travels length of mandible - radiolucent; has cortical walls - houses inferior alveolar nerve






19. Located at the midline of anterior portion of hard palate behind maxillary central incisors; round radiolucency between roots of centrals






20. Extends from alveolar bone between maxillary centrals to posterior hard palate; seen as a radiolucent line






21. Gray






22. Produced when an electron hits the nucleus of a tungsten atom or passes very close to the nucleus of a tungsten atom.






23. Coronal part of alveolar bone - between teeth - cortical bone - radiopaque






24. Encases/supports teeth






25. Linear prominence that appears radiopaque.






26. Mostly seen in mandibular nerve/blood supply vertical radiolucent lines






27. The penetrating x-ray beam that is produced at the target of the anode






28. Cortical bone - radiopaque band above maxillary incisors






29. X-radiation created when the primary beam interacts with a matter






30. Suggest that no matter how small the amount of radiation received - some biologic damage occurs.






31. Occurs frequently due to the high concentration of water in cells.






32. Posterior to mandibular third molar






33. Rate which exposure to radiation occurs and absorption occurs (more damage occurs with high dose due to rapid delivery and does not allow for repair)






34. Dental x-ray machines operating 70 kVp or below: minimum 1.5 mm aluminum filtration - Dental x-ray machines operating above 70 kVp: minimum of 2.5 mm. of aluminum filtration.






35. Surrounds root - cortical bone - radiopaque






36. Produced when a high-speed electron dislodges an inner-shell electron from a tungsten atom and causes ionization of that atom. Occurs only at 70 kVp and above.






37. Bony prominence posterior to maxillary third molar; radiopaque






38. Cortical bone; J or U shaped radiopacity






39. Thin - curved areas of bone - radiopacities within nasal cavity and septum






40. 'Cortex'-> dense - outer layer; also called compact bone-appears radiopaque on film






41. Can control the current passing from the cathode to the anode.






42. Effects seen years - decades - or generations later






43. Time between exposure to ionizing radiation and the appearance of observable clinical signs.






44. More damage can occur in younger or rapidly dividing cells






45. Closed - pointed cone-high production of scatter - not used any longer.






46. Reproductive (ova - sperm). Effects are passed on to generations. Genetic damage cannot be repaired






47. Darkness or blackness on film. If kVp is increased film will be darker. If decreased - film will be lighter






48. Occurs very little; most photons pass through cell with little or no damage






49. Aluminum disks between collimator and tubehead seal. Aluminum disks filter long wavelength - low energy x-rays from x-ray beam. 0.5 mm increments






50. Within maxillary sinus; acts as a division - radiopaque lines sometimes not visible