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11 April 1996 Significance of exposure data recognizer modes in computed radiography
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Abstract
To take advantage of the wide latitude of computed radiography (CR), the AC series manufactured by Fuji uses an exposure data recognizer (EDR) system which may be operated in one of three modes: automatic, semi-automatic (semi auto), and fixed. This study evaluated the performance of these EDR modes in comparison with a conventional screen-film combination. Multiple images of foot and skull phantoms were obtained and measurements made of the resultant film density, density variability and contrast. The auto mode could correct for inaccurate exposures but introduced additional variability to CR film density. Semi auto mode had improved consistency but could result in suboptimal data processing parameters. For constant exposures, fixed mode had a consistency comparable to screen-film combinations but could not compensate for radiation dose variations. Selection of an optimal mode of operation requires an understanding of how the EDR affects CR performance and depends on the clinical problem at hand.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Walter Huda, Richard M. Slone, Manuel Arreola, Beverly A. Hoyle, and Zhenxue Jing "Significance of exposure data recognizer modes in computed radiography", Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); https://doi.org/10.1117/12.237823
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