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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. 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






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






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






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






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






6. Bump or nodule that appears radiopaque






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






8. 'hooklike' - posterior to maxillary tuberosity; extension of medial pterygoid plate of sphenoid bone; radiopaque






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






10. Encases/supports teeth






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






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






13. 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






14. Coulombs per kilogram






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






16. Posterior to mandibular third molar






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






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






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






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






21. 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)






22. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






24. Bony wall that divides 2 spaces - radiopaque






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






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






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






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






29. 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)






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






31. 68 Degrees F






32. 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)






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






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






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






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






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






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






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






40. Linear prominence that appears radiopaque.






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






42. Bony prominence posterior to maxillary third molar; radiopaque






43. Sharp - thornlike projection that appears radiopaque.






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






45. 'Arranged like a lattice'->soft - spongy bone located between 2 layers of cortical bone; spaces are trabeculae that are filled with bone marrow.






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






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






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






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






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