Test your basic knowledge |

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






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






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






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






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






6. Hole in bone below mandibular premolars - blood supply to lower lip exits here; radiolucent; often misdiagnosed for periapical pathology






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






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






9. U-shaped portion extending from ramus to ramus






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






11. 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.






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






13. 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)






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






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






16. 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)






17. Hollow space - cavity that appears radiolucent






18. Posterior to mandibular third molar






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






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






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






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






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






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






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






26. Rounded prominence that appears radiopaque






27. Do not occur in dentistry






28. 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)






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






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






31. Linear prominence that appears radiopaque.






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






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






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






35. Reproductive (ova - sperm). Effects are passed on to generations. Genetic damage cannot be repaired






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






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






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






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






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






41. Bump or nodule that appears radiopaque






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






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






44. Bony prominence posterior to maxillary third molar; radiopaque






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






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






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






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






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