TY - JOUR T1 - Deep Active Lesion Segmentation JF - bioRxiv DO - 10.1101/794529 SP - 794529 AU - Ali Hatamizadeh AU - Assaf Hoogi AU - Debleena Sengupta AU - Wuyue Lu AU - Brian Wilcox AU - Daniel Rubin AU - Demetri Terzopoulos Y1 - 2019/01/01 UR - http://biorxiv.org/content/early/2019/10/07/794529.abstract N2 - Lesion segmentation is an important problem in computer-assisted diagnosis that remains challenging due to the prevalence of low contrast, irregular boundaries that are unamenable to shape priors. We introduce Deep Active Lesion Segmentation (DALS), a fully automated segmentation framework that leverages the powerful nonlinear feature extraction abilities of fully Convolutional Neural Networks (CNNs) and the precise boundary delineation abilities of Active Contour Models (ACMs). Our DALS framework benefits from an improved level-set ACM formulation with a per-pixel-parameterized energy functional and a novel multiscale encoder-decoder CNN that learns an initialization probability map along with parameter maps for the ACM. We evaluate our lesion segmentation model on a new Multiorgan Lesion Segmentation (MLS) dataset that contains images of various organs, including brain, liver, and lung, across different imaging modalities—MR and CT. Our results demonstrate favorable performance compared to competing methods, especially for small training datasets. ER -