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






2. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






4. 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)






5. Bony prominence posterior to maxillary third molar; radiopaque






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






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






8. 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)






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






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






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






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






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






14. 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.






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






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






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






18. 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)






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






20. Effects seen years - decades - or generations later






21. 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






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






23. Rounded prominence that appears radiopaque






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






25. U-shaped portion extending from ramus to ramus






26. Hollow space - cavity that appears radiolucent






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






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






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






30. Linear prominence that appears radiopaque.






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






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






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






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






36. Marked prominence that appears radiopaque.






37. 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






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






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






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






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






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






43. Cortical bone; J or U shaped radiopacity






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






46. Sharp - thornlike projection that appears radiopaque.






47. Gray






48. Posterior to mandibular third molar






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






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