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






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






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






4. U-shaped portion extending from ramus to ramus






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






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






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. Sharp - thornlike projection that appears radiopaque.






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






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






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






12. Hollow space - cavity that appears radiolucent






13. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






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






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






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






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






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






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






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






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






22. Bump or nodule that appears radiopaque






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






25. Coulombs per kilogram






26. 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)






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






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






29. Surrounds root - cortical bone - radiopaque






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






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






32. 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.






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






34. 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.






35. Bony prominence posterior to maxillary third molar; radiopaque






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






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






38. Linear prominence that appears radiopaque.






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






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






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






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






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






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






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






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






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






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






49. Mature bone - muscle - nerve






50. Cortical bone - radiopaque band above maxillary incisors