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Radiology 3

Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. Darkness or blackness on film. If kVp is increased film will be darker. If decreased - film will be lighter






2. Bony wall that divides 2 spaces - radiopaque






3. Do not occur in dentistry






4. Marked prominence that appears radiopaque.






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






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






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






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






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






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






11. 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.






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






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






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






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






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






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






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






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






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






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






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






23. Surrounds root - cortical bone - radiopaque






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






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






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






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






28. Bony prominence posterior to maxillary third molar; radiopaque






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






30. 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.






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






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






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






34. Linear prominence that appears radiopaque.






35. Continues from ramus; radiopaque band






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






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






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






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






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






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






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






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






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






45. Extends from alveolar bone between maxillary centrals to posterior hard palate; seen as a radiolucent line






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






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






48. U-shaped portion extending from ramus to ramus






49. Mature bone - muscle - nerve






50. Gray







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