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






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






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






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






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






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






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






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






9. Cortical bone; J or U shaped radiopacity






10. 16-20 square feet (at least 4x4) - Light tight - Safelight must be at least 4 feet from the working area






11. Cortical bone - radiopaque band above maxillary incisors






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






13. Mature bone - muscle - nerve






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






15. Hollow space - cavity that appears radiolucent






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






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






18. Coulombs per kilogram






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






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






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






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






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






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






25. Do not occur in dentistry






26. U-shaped portion extending from ramus to ramus






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






28. 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






29. Linear prominence that appears radiopaque.






30. Sharp - thornlike projection that appears radiopaque.






31. 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)






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






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






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






35. 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)






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






37. Marked prominence that appears radiopaque.






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






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






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






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






42. Rounded prominence that appears radiopaque






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






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






45. 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.






46. 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.






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






48. Sievart






49. Bony prominence posterior to maxillary third molar; radiopaque






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