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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. Linear prominence that appears radiopaque.






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






3. Cortical bone - radiopaque band above maxillary incisors






4. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






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






7. 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)






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






9. Bony wall that divides 2 spaces - radiopaque






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






11. 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






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






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






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






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






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






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






18. Do not occur in dentistry






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






20. Encases/supports teeth






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






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






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






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






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






26. 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)






27. Bony prominence posterior to maxillary third molar; radiopaque






28. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






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






31. 68 Degrees F






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. Marked prominence that appears radiopaque.






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






35. Hollow space - cavity that appears radiolucent






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






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






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






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






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






41. 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






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






43. Sharp - thornlike projection that appears radiopaque.






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






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






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






47. 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.






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






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






50. Rounded prominence that appears radiopaque