Test Bank for Digital Radiography and PACS 4th Edition by Carter

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Test Bank for Digital Radiography and PACS 4th Edition by Carter

13. Each light photon is assigned a number during a. amplification. b. sampling. c. digitization. d. laser scanning. ANS: C OBJ: Explain the process of reading and erasing the imaging plate. 14. The wavelength of the PSP reader laser is ______ nm. a. 336 b. 636 c. 633 d. 366 ANS: C OBJ: Explain the process of reading and erasing the imaging plate. 15. The laser scans the imaging plate in a ______ pattern. a. raster b. horizontal c. circular d. random ANS: A OBJ: Explain the process of reading and erasing the imaging plate. 16. The process of scanning the moving imaging plate is known as a. transition. b. raster scanning. c. digitization. d. translation. ANS: D OBJ: Explain the process of reading and erasing the imaging plate. 17. Which of the following does not determine PSP resolution? a. Phosphor layer thickness b. Pixel size c. The number of pixels d. Laser scan speed ANS: D OBJ: Compare conventional radiographic screen and film speed to PSP systems. 18. PSP imaging plates are erased by flooding the plate with a. light. b. radiation. c. electrons. d. phosphors. ANS: A OBJ: Explain the process of reading and erasing the imaging plate. 19. The amount of detail present in any image is known as ______ resolution. a. contrast b. density c. spatial abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirbcom/test d. optical ANS: C OBJ: Explain the process of reading and erasing the imaging plate. 20. The selection of the incorrect body part from the examination menu may result in a. no image. b. image misinterpretation. c. proper density and contrast. d. no difference in image sharpness. ANS: B OBJ: Discuss the importance of matching the body part being examined to the examination menu. 21. Kilovoltage peak (kVp) should be chosen a. to provide the least contrast possible. b. to provide penetration. c. for the type and amount of contrast desired. d. for the type of imaging plate phosphor. ANS: B OBJ: Discuss the selection of technical factors for density, contrast, and penetration. 22. The k-edge of phosphor imaging plates ranges from ______ keV. a. 10–30 b. 20–40 c. 30–50 d. 40–60 ANS: C OBJ: Discuss the selection of technical factors for density, contrast, and penetration. 23. The range of kVp that can be used with PSP systems is a. 45–120. b. 55–130. c. 65–120. d. 75–130. ANS: A OBJ: Discuss the selection of technical factors for density, contrast, and penetration. 24. Milliampere-seconds (mA-s) is selected for the a. shortest time possible. b. longest time possible. c. number of electrons needed. d. amount of penetration needed. ANS: C OBJ: Discuss the selection of technical factors for density, contrast, and penetration. 25. When insufficient light is produced by the imaging plate phosphor, the image will a. not be formed. b. be grainy. c. be dark. abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirb.com/test abirbcom/test d. be detailed. ANS: B OBJ: Discuss the selection of technical factors for density, contrast, and penetration. 26. Quantum mottle is caused by a. excessive mA-s. b. excessive kVp. c. insufficient distance. d. insufficient light. ANS: D OBJ: Discuss the selection of technical factors for density, contrast, and penetration. 27. Which of the following should be considered when selecting the PSP cassette? a. Size and speed b. Type and speed c. Size and type d. None of these ANS: C OBJ: Describe the imaging plate and grid selection process. 28. The higher the number of pixels in a matrix, the a. higher the image resolution. b. lower the image resolution. c. lack of effect on image resolution. d. smaller the image. ANS: A 29. Grid use for PSP examinations is more critical than in film/screen radiography because CR a. examinations produce more scatter. b. imaging plates record more densities. c. imaging plates record less scatter. d. examinations require much higher kVp values. ANS: B focus. d. size

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