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






2. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






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






5. Sharper of dark and light areas and how they are separated on film. Low kVp results in high contrast (many white and black areas - very little gray). Useful when diagnosing decay. High kVp results in low contrast (many shades of grade) Useful for per






6. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






7. Reduces exposed silver halide crystals into black metallic silver a makes dark/black areas on film; unexposed silver halide crystals are unaffected by developer






8. Quantity of radiation received or total amount absorbed (more damage with tissue absorbing large quantities of radiation)






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






10. Do not occur in dentistry






11. Used to increase incoming voltage to 65 -000 to 100 -000 volts used by the high-voltage circuit.






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






13. Bony wall that divides 2 spaces - radiopaque






14. An x-ray photon that has its path altered by matter.






15. 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)






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






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






18. The measurement of the number of electrons moving through a conductor. Measured in amperes (A) or milliamperes (mA)






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






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






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






22. V-shaped radiopacity at intersection of floor of nasal cavity and septum






23. Marked prominence that appears radiopaque.






24. Intersection of maxillary sinus and nasal cavity - radiopaque - cortical bone; above maxillary canine.






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






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






27. Scooped out of depressed area of bone that appears radiolucent






28. Can increase or decrease the number of electrons passing through the cathode filament






29. Between canine and lateral incisor - depression is not always visible - radiolucent






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






31. 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)






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






33. Effects seen years - decades - or generations later






34. Hole in bone below mandibular premolars - blood supply to lower lip exits here; radiolucent; often misdiagnosed for periapical pathology






35. Sievart






36. 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.






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






38. Opening/hole in bone that allows the passage of blood vessels/nerves and appears radiolucent






39. Coulombs per kilogram






40. Hollow space - cavity that appears radiolucent






41. U-shaped portion extending from ramus to ramus






42. Posterior to mandibular third molar






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






44. Linear prominence that appears radiopaque.






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






46. Mature bone - muscle - nerve






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






48. Sharp - thornlike projection that appears radiopaque.






49. Used to decrease voltage from the incoming 110- or 220-line voltage to the 3 to 5 volts used by the filament circuit.






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