Test your basic knowledge |

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. 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)






2. Posterior to mandibular third molar






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






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






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






6. 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.






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






8. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






9. Gray






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






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






12. 68 Degrees F






13. Rounded prominence that appears radiopaque






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






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






16. Encases/supports teeth






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






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






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






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






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






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






23. 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






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






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






26. Bony wall that divides 2 spaces - radiopaque






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






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






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






30. Mature bone - muscle - nerve






31. U-shaped portion extending from ramus to ramus






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






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






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






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






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






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






38. Bony prominence posterior to maxillary third molar; radiopaque






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






40. 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






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






42. 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)






43. Cortical bone - radiopaque band above maxillary incisors






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






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






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






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






48. Effects seen years - decades - or generations later






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