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






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






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






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






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






6. Do not occur in dentistry






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






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






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






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






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






12. 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)






13. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






15. Gray






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






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






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






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






20. Bony prominence posterior to maxillary third molar; radiopaque






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






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






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






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






25. 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)






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






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






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






29. U-shaped portion extending from ramus to ramus






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






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






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






33. Encases/supports teeth






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






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






36. Posterior to mandibular third molar






37. Bony wall that divides 2 spaces - radiopaque






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






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






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






41. Rounded prominence that appears radiopaque






42. Pear shaped compartment - appears above maxillary incisors. Appears as a large radiolucent area above the maxilla.






43. 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)






44. Bump or nodule that appears radiopaque






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






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






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






48. Continues from ramus; radiopaque band






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






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