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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. 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)






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






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






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






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






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






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






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






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






10. 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






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






12. Mature bone - muscle - nerve






13. Sharp - thornlike projection that appears radiopaque.






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






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






16. Bump or nodule that appears radiopaque






17. Linear prominence that appears radiopaque.






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






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






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






21. Coulombs per kilogram






22. 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)






23. 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.






24. Bony prominence posterior to maxillary third molar; radiopaque






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






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






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






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






29. 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.






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






31. Do not occur in dentistry






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






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






34. Posterior to mandibular third molar






35. Encases/supports teeth






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






37. Rounded prominence that appears radiopaque






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






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






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






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






42. U-shaped portion extending from ramus to ramus






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






44. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






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






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






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






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