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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. Bony prominence posterior to maxillary third molar; radiopaque






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






3. Pear shaped compartment - appears above maxillary incisors. Appears as a large radiolucent area above the maxilla.






4. Sievart






5. A form of secondary radiation - the result of x-rays that has been deflected from its path by an interaction with matter.






6. All cells except reproductive; effects are seen in person irradiated






7. Rounded prominence that appears radiopaque






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






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






10. Posterior to mandibular third molar






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






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






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






14. Surrounds root - cortical bone - radiopaque






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






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






17. Restricts size and shape of beam to lower patient exposure - Round: cone shaped beam-2.75 inches in diameter - Rectangular: Rectangular beam slightly larger than size 2 film- lowers patient exposure






18. 'Cheekbone'; cortical bone; radiopaque band extending from zygomatic process.






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






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






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






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






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






24. 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)






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






26. Gray






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






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






29. Somatic effects that have a threshold; effects increase in severity with increasing absorbed dose. (Examples: Erythema - loss of hair - cataracts - and decreased fertility)






30. Do not occur in dentistry






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






32. The x-ray photon is deflected from its path during its passage through matter






33. Two small openings (radiolucent) found on floor of nasal cavity->common exit is incisive foramen






34. Mature bone - muscle - nerve






35. Effects seen years - decades - or generations later






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






37. Hollow space - cavity that appears radiolucent






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






39. Encases/supports teeth






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






41. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






42. Continues from ramus; radiopaque band






43. Tubes within maxillary sinus that carry nerves - blood supply - radiolucent band with boundary of two radiopaque cortical bony lines






44. Coulombs per kilogram






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






46. 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






47. Marked prominence that appears radiopaque.






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






49. Removes unexposed silver halide crystals and creates white/clear areas on film; black metallic silver remains on film.






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