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






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






3. Effects seen years - decades - or generations later






4. Coulombs per kilogram






5. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






6. Sharp - thornlike projection that appears radiopaque.






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






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






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






10. Bony wall that divides 2 spaces - radiopaque






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






12. Continues from ramus; radiopaque band






13. Posterior to mandibular third molar






14. Cortical bone; J or U shaped radiopacity






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






16. Bump or nodule that appears radiopaque






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






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






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






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






21. Cortical bone - radiopaque band above maxillary incisors






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






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






24. Encases/supports teeth






25. Mature bone - muscle - nerve






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






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






28. Gray






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






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






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






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






33. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






35. Do not occur in dentistry






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






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






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






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






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






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






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






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






44. 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.






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






46. Rate which exposure to radiation occurs and absorption occurs (more damage occurs with high dose due to rapid delivery and does not allow for repair)






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






48. Sievart






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






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