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






2. Gray






3. U-shaped portion extending from ramus to ramus






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






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






6. Linear prominence that appears radiopaque.






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






8. 68 Degrees F






9. 8 inch and 16 inch; longer are preferred due to less divergence of beam - open ended and lead lined.






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






11. Posterior to mandibular third molar






12. Coulombs per kilogram






13. A line of union between adjoining bones - found only in skull; appears as radiolucent line






14. 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.






15. Sharp - thornlike projection that appears radiopaque.






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






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






18. 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






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






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






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






22. Surrounds root - cortical bone - radiopaque






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






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






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






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






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






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






29. Bony wall that divides 2 spaces - radiopaque






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






31. 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)






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






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






34. Do not occur in dentistry






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






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






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






38. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






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






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






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






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






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






45. 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)






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






47. Sharper of dark and light areas and how they are separated on film. Low kVp results in high contrast (many white and black areas - very little gray). Useful when diagnosing decay. High kVp results in low contrast (many shades of grade) Useful for per






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






49. 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)






50. Bony prominence posterior to maxillary third molar; radiopaque