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28 May 2001 Optimizing softcopy display of radiographic images acquired with a prototype flat-panel detector
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This study optimized softcopy display of digital radiographic images acquired using a prototype flat panel detector. Six look up table (LUT) shapes were evaluated, consisting of linear, logarithmic, exponential, 1-exp, sigmoidal, and reverse sigmoidal. Representative digital radiographs covering five body regions (skull, neck, chest, knee and foot) were reviewed on a monitor. Images were assessed on a scale of 1 to 10, with a score of 1 indicating an uninterpretable examination, and a score of 10 indicating a perfect image. The difference between the final and initial image quality scores were ((Delta) ), which corresponds to the improvement achievable by the selected LUT. Major improvements in image quality were achieved using LUTs of the type 1-exp. A comprehensive analysis was made of four versions of the 1-exp LUT applied to forty clinical images. Use of the one version of this 1-exp LUT resulted in the best achievable image quality in 95% of the cases (38/40), with an average (Delta) score of 3.4. These results demonstrate that a logarithmic style LUT can significantly improve image quality in comparison to linear LUTs. Of particular importance was the fact that a single LUT achieved excellent image quality for a broad range of clinical radiographs.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Walter Huda, Kent M. Ogden, Ernest M. Scalzetti, and Mahmoud El-kaissi "Optimizing softcopy display of radiographic images acquired with a prototype flat-panel detector", Proc. SPIE 4319, Medical Imaging 2001: Visualization, Display, and Image-Guided Procedures, (28 May 2001);

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