6 May 2004 Detection of interstitial lung disease in PA chest radiographs
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Abstract
A computer-aided diagnosis scheme for the detection of interstitial disease in standard digital posteroanterior (PA) chest radiographs is presented. The detection technique is supervised-manually labelled data should be provided for training the algorithm-and fully automatic, and can be used as part of a computerized analysis scheme for X-ray lung images. Prior to the detection, a segmentation should be performed which delineates the lung field boundaries. Subsequently, a quadratic decision rule is employed for every pixel within the lung fields to associate with each pixel a probabilistic measure indicating interstitial disease. The locally obtained per-pixel probabilities are fused to a single global probability indicating to what extent there is interstitial disease present in the image. Finally, a threshold on this quantity classifies the image as containing interstitial disease or not. The probability combination scheme presented utilizes the quantiles of the local posterior probabilities to fuse the local probability into a global one. Using this nonparametric technique, reasonable results are obtained on the interstitial disease detection task. The area under the receiver operating characteristic equals 0.92 for the optimal setting.
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Marco Loog, Marco Loog, Bram van Ginneken, Bram van Ginneken, Mads Nielsen, Mads Nielsen, } "Detection of interstitial lung disease in PA chest radiographs", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); doi: 10.1117/12.535307; https://doi.org/10.1117/12.535307
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