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Fig. 5 | BMC Medical Imaging

Fig. 5

From: A new tool for assessing Pectus Excavatum by a semi-automatic image processing pipeline calculating the classical severity indexes and a new marker: the Volumetric Correction Index

Fig. 5

Algorithm for inner wall contour correction. a Grey-scale image after masking out cardiac structures in order to create a mask of inner thoracic area. b Grey-scale image with inner chest boundary pixel locations in red. The error appears around inferior lung area, that has grey values close to thoracic tissue ones. c Plot of x and y coordinates corresponding to inner chest boundary pixels. In red there is the reference curve used for correction, while in green the curve that need to be corrected by algorithm. Between two blue arrows there are the points resulting from interpolation process that substitute incorrect ones. d Inner chest boundary pixel locations after correction are represented in red while those before correction in green; in blue there is inner contour of the reference curve, belonging to previous slice

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BMC Medical Imaging

ISSN: 1471-2342

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