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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. Effects seen years - decades - or generations later






2. Continues from ramus; radiopaque band






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






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






5. Posterior to mandibular third molar






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






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






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






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






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






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






12. 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






13. Sievart






14. Cortical bone; J or U shaped radiopacity






15. Coulombs per kilogram






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






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






18. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






19. Area of body exposed total body produced more adverse effects






20. 68 Degrees F






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






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






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






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






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






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






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






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






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






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






31. U-shaped portion extending from ramus to ramus






32. Bony prominence posterior to maxillary third molar; radiopaque






33. Bony wall that divides 2 spaces - radiopaque






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






35. Mature bone - muscle - nerve






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






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






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






39. Bump or nodule that appears radiopaque






40. Encases/supports teeth






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






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






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






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






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






46. Do not occur in dentistry






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






48. 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.






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






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