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






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






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






4. Anterior ramus of mandible; attachment for muscle of mastication; superimposed around maxillary tuberosity.






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






6. Hollow space - cavity that appears radiolucent






7. 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.






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






9. Cortical bone; J or U shaped radiopacity






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






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






12. A direct function of the dose. No dose threshold; effects do not depend on the magnitude of the absorbed dose (Examples: cancer and genetic mutations)






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






14. Coulombs per kilogram






15. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






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






18. Tube that passes through bone - contains nerve canals/blood vessels/and appears radiolucent






19. Continues from ramus; radiopaque band






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






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






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






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






24. Bump or nodule that appears radiopaque






25. 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






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






27. Marked prominence that appears radiopaque.






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






29. 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)






30. 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.






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






32. Located above maxillary premolar/molar teeth - border is made up of cortical bone; sinus cavity is radiolucent compartment






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






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






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






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






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






38. Posterior to mandibular third molar






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






40. 68 Degrees F






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






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






43. Mature bone - muscle - nerve






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






45. Linear prominence that appears radiopaque.






46. Gray






47. 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






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






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






50. Sharp - thornlike projection that appears radiopaque.