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






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






3. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






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






6. 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.






7. 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)






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






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






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






11. Cortical bone; J or U shaped radiopacity






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






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






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






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






16. Do not occur in dentistry






17. Coulombs per kilogram






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






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






20. Hollow space - cavity that appears radiolucent






21. 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






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






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






24. Sievart






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






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






27. Bony prominence posterior to maxillary third molar; radiopaque






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






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






30. U-shaped portion extending from ramus to ramus






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






32. 68 Degrees F






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






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






35. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






36. Mature bone - muscle - nerve






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






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






39. 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.






40. Bump or nodule that appears radiopaque






41. Linear prominence that appears radiopaque.






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






43. 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)






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






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






46. Effects seen years - decades - or generations later






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






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






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






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