Fig. 5.

Representative lumen and calcification segmentation results obtained using OCTOPUS software. (Left) Calcification with angle <90° and maximum thickness <1.0 mm, (middle) angle <180° and maximum thickness >1.0 mm, and (right) angle <360° and maximum thickness >1.0 mm. The top, middle, and bottom rows show original IVOCT images, manual, and automated segmentations, respectively. Manual segmentations (middle) was used to train deep learning models. The software provides reliable segmentation results in most situations. Yellow and red indicate the lumen and calcified plaque, respectively. White asterisk (*) indicates the guidewire shadow. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)