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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. Do not occur in dentistry






2. 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.






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






4. 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






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






6. Sharp - thornlike projection that appears radiopaque.






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






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






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






10. Cortical bone; J or U shaped radiopacity






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






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






13. Coulombs per kilogram






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






15. Hollow space - cavity that appears radiolucent






16. 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)






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






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






19. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






20. 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)






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






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






23. Gray






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






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






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






27. Somatic effects that have a threshold; effects increase in severity with increasing absorbed dose. (Examples: Erythema - loss of hair - cataracts - and decreased fertility)






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






29. Marked prominence that appears radiopaque.






30. Bony prominence posterior to maxillary third molar; radiopaque






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






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






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






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






35. Bony wall that divides 2 spaces - radiopaque






36. Effects seen years - decades - or generations later






37. Rounded prominence that appears radiopaque






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






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






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






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






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






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






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






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






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






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






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






49. 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)






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