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Radiology 3

Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. Two small openings (radiolucent) found on floor of nasal cavity->common exit is incisive foramen






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






3. 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)






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






5. 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.






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






7. Restricts size and shape of beam to lower patient exposure - Round: cone shaped beam-2.75 inches in diameter - Rectangular: Rectangular beam slightly larger than size 2 film- lowers patient exposure






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






9. 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)






10. Linear prominence that appears radiopaque.






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






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






13. Encases/supports teeth






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






15. Bony wall that divides 2 spaces - radiopaque






16. U-shaped portion extending from ramus to ramus






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






18. Cortical bone - radiopaque band above maxillary incisors






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






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






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






22. 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.






23. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






24. 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)






25. Effects seen years - decades - or generations later






26. Posterior to mandibular third molar






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






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






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






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






31. Sharp - thornlike projection that appears radiopaque.






32. 68 Degrees F






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






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






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






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






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






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






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






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






41. Hollow space - cavity that appears radiolucent






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






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






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






45. Surrounds root - cortical bone - radiopaque






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






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






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






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






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