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






2. Surrounds root - cortical bone - radiopaque






3. 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.






4. Bump or nodule that appears radiopaque






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






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






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






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






9. Gray






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






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






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






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






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






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






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






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






18. Posterior to mandibular third molar






19. Sharp - thornlike projection that appears radiopaque.






20. Coulombs per kilogram






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






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






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






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






25. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






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






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






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






30. 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)






31. Continues from ramus; radiopaque band






32. U-shaped portion extending from ramus to ramus






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






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






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






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






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






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






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






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






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






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






43. Space between root and the lamina dura - thin - radiolucent line - healthy PDL is uniform thickness






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






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






46. Bony wall that divides 2 spaces - radiopaque






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






48. 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)






49. Rounded prominence that appears radiopaque






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