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CA Fluoro Review Quiz

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1. if 3gm of tissue absorb 300ergs of x-ray energy, what is the dose?




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2. for fluoro equipment with automatic exposure rate control, the x-ray tube current and potential shall be monitored at least:




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3. Proper collimation will: A. Decrease patient exposure B. Reduce scatter radiation C. Improve image quality D. All of the above




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4. the time over which the human eye can store a visual image is termed ________ time.




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5. If the occupational dose during a 12 minute fluoroscopy procedure is 37 mrem at 2.5’ away from the source, what will it be at 5’ away from the source? –Put your answer in mrem/min




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6. the electron beam of the camera is _______ with the TV monitor.




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7. If the occupational dose is 5 mRem/min at a distance of 2’ from the source, what is the occupational dose at 4’?




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8. fluoroscopic operators shall restrict the beam "on" time to a minimum. doubling the exposure time will also _______ the exposure to the patient. a. quadruple b. one-half c. double d. one-fourth




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9. Which does not reduce patient and operator exposure? A. Reduced “on” time B. Low mA, high kVp C. Decreased patient-screen distance D. Increased patient-screen distance




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10. the genetically significant dose is a factor of which of the following parameters, (1)xray examination rate (2)mean gonadal dose per examination (3)number of chromosomes damaged (4)number of future children: a. 1,3,4 b. 2,3 c. 1,2,4 d. 1,2,3 e. 3,4




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11. B. ABC mode (Remember 5 R/min unless: ABC (10 R/min), boost (20 R/min), magnification (unlimited) and image acquisition (unlimited)(




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12. 5R




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13. c. 1,2,4




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14. A. Reduce patient dose (recording the image without using cine or spot films reduces patient dose)




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15. c. 9 in of water




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16. output phosphor (so that light does not emit back to the photo-cathode. only e- can get through to excite the phosphor)




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17. video signal




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18. quantum noise




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19. D. 7 7/8” lucite




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20. effects exhibit in future offspring of persons who have been irradiated.





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