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Example of a lung segmentation with and without the sheetness filter approach and corresponding intermediate results. (a) Original CT slice. (b) Standard cost function (Ref. 6), and (c) resulting lung segmentations that are overlapping. (d) Result of the classification-based detection of thin tissue layer between lungs (objects are shown in black). (e) Improved cost function after incorporating the classification result shown in (d). (f) Resulting lung segmentations without overlap.
