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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. Area of body exposed total body produced more adverse effects






2. 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)






3. Gray






4. Sievart






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






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






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






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






9. Surrounds root - cortical bone - radiopaque






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






11. Hollow space - cavity that appears radiolucent






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






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






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






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






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






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. 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.






19. Linear prominence that appears radiopaque.






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






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






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






23. Cortical bone - radiopaque band above maxillary incisors






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






25. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






26. Bony wall that divides 2 spaces - radiopaque






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






28. Cortical bone; J or U shaped radiopacity






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






31. Bump or nodule that appears radiopaque






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






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






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






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






36. Effects seen years - decades - or generations later






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






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






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






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






41. Continues from ramus; radiopaque band






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






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






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






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






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






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






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






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






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