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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. 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.






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






3. Gray






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






5. Bony prominence posterior to maxillary third molar; radiopaque






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






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






8. Continues from ramus; radiopaque band






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






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






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






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






13. Rounded prominence that appears radiopaque






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






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






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






17. Cortical bone - radiopaque band above maxillary incisors






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






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






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






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






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






23. Encases/supports teeth






24. 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)






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






26. Cortical bone; J or U shaped radiopacity






27. U-shaped portion extending from ramus to ramus






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






29. Hollow space - cavity that appears radiolucent






30. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






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






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






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






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






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






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






38. Bump or nodule that appears radiopaque






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






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






41. Posterior to mandibular third molar






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






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






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






45. 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)






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






47. 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






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






49. Within maxillary sinus; acts as a division - radiopaque lines sometimes not visible






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