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






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






3. Continues from ramus; radiopaque band






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






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






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






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






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






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






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






11. Surrounds root - cortical bone - radiopaque






12. Hollow space - cavity that appears radiolucent






13. Do not occur in dentistry






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






15. 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)






16. Marked prominence that appears radiopaque.






17. Bump or nodule that appears radiopaque






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. Sharper of dark and light areas and how they are separated on film. Low kVp results in high contrast (many white and black areas - very little gray). Useful when diagnosing decay. High kVp results in low contrast (many shades of grade) Useful for per






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






21. 68 Degrees F






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






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






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






25. Gray






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






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






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






29. 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)






30. 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.






31. Removes unexposed silver halide crystals and creates white/clear areas on film; black metallic silver remains on film.






32. Mature bone - muscle - nerve






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






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






35. U-shaped portion extending from ramus to ramus






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






37. Posterior to mandibular third molar






38. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






40. Cortical bone - radiopaque band above maxillary incisors






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






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






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






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






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






46. Coulombs per kilogram






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. Scooped out of depressed area of bone that appears radiolucent






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






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