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






2. 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.






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






4. Surrounds root - cortical bone - radiopaque






5. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






7. Cortical bone; J or U shaped radiopacity






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






9. 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)






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






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






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






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






14. Cortical bone - radiopaque band above maxillary incisors






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






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






17. Marked prominence that appears radiopaque.






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






19. Bony wall that divides 2 spaces - radiopaque






20. 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)






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






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






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






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






25. Rounded prominence that appears radiopaque






26. Mature bone - muscle - nerve






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






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






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






30. Bump or nodule that appears radiopaque






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






48. Gray






49. U-shaped portion extending from ramus to ramus






50. Posterior to mandibular third molar