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






2. Linear prominence that appears radiopaque.






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






4. Hollow space - cavity that appears radiolucent






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






6. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






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






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






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






11. Do not occur in dentistry






12. Cortical bone - radiopaque band above maxillary incisors






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






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






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






16. 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)






17. 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.






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






19. 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.






20. Marked prominence that appears radiopaque.






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






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






23. Gray






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






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






26. Coulombs per kilogram






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






28. Sharp - thornlike projection that appears radiopaque.






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






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






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






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






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






34. U-shaped portion extending from ramus to ramus






35. 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






36. Bony prominence posterior to maxillary third molar; radiopaque






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






38. Mature bone - muscle - nerve






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






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






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






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






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






44. Effects seen years - decades - or generations later






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






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






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






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






49. Surrounds root - cortical bone - radiopaque






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