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Radiology 3

Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Anterior ramus of mandible; attachment for muscle of mastication; superimposed around maxillary tuberosity.






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






3. Bony prominence posterior to maxillary third molar; radiopaque






4. Hollow space - cavity that appears radiolucent






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






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






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






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






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






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






11. Surrounds root - cortical bone - radiopaque






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






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






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






15. Occurs frequently due to the high concentration of water in cells.






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






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






18. 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)






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






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






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






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






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






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. Mature bone - muscle - nerve






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






27. 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.






28. 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.






29. U-shaped portion extending from ramus to ramus






30. Do not occur in dentistry






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






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






33. Gray






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






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






36. Sievart






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






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






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






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






41. Coulombs per kilogram






42. Effects seen years - decades - or generations later






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






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






45. 68 Degrees F






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






47. Sharp - thornlike projection that appears radiopaque.






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






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






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







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