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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. 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)






2. Continues from ramus; radiopaque band






3. 68 Degrees F






4. Marked prominence that appears radiopaque.






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






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






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






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






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






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






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






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






13. Surrounds root - cortical bone - radiopaque






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






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






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






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






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






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






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






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






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






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






24. Encases/supports teeth






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






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






27. Hollow space - cavity that appears radiolucent






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






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






30. Posterior to mandibular third molar






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






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






33. Do not occur in dentistry






34. 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)






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






36. Cortical bone - radiopaque band above maxillary incisors






37. Cortical bone; J or U shaped radiopacity






38. Bony prominence posterior to maxillary third molar; radiopaque






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






40. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






42. 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.






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






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






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






46. Rounded prominence that appears radiopaque






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






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






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






50. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area