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






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






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






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






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






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






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






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






9. 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.






10. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






12. Hollow space - cavity that appears radiolucent






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






14. Rounded prominence that appears radiopaque






15. Linear prominence that appears radiopaque.






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






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






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






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






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






21. Posterior to mandibular third molar






22. Effects seen years - decades - or generations later






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






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






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






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






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






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






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






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






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






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






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






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






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






36. Do not occur in dentistry






37. Bony wall that divides 2 spaces - radiopaque






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






39. Mature bone - muscle - nerve






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






41. U-shaped portion extending from ramus to ramus






42. Cortical bone; J or U shaped radiopacity






43. Continues from ramus; radiopaque band






44. Bony prominence posterior to maxillary third molar; radiopaque






45. 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)






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






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






48. Coronal part of alveolar bone - between teeth - cortical bone - radiopaque






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






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