A Self-Training Teacher-Student Model with an Automatic Label Grader for Abdominal Skeletal Muscle Segmentation
Artificial Intelligence in Medicine(2022)CCF CSCI 2区
Univ Pittsburgh | Nanjing Med Univ
Abstract
Deep learning on a limited number of labels/annotations is a challenging task for medical imaging analysis. In this paper, we propose a novel self-training segmentation pipeline (Self-Seg in short) for segmenting skeletal muscle in CT images. Self-Seg starts with a small set of annotated images and then iteratively learns from un-labeled datasets to gradually improve the segmentation performance. Self-Seg follows a semi-supervised teacher -student learning scheme and there are two contributions: 1) we construct a self-attention UNet to improve segmentation over the classical UNet model, and 2) we implement an automatic label grader to implicitly incorporate medical knowledge for quality assurance of pseudo labels, from which good quality pseudo labels are identified to enhance learning of the segmentation model. We perform extensive experiments on three CT image datasets and show promising results on five evaluation settings, and we also compared our method to several baseline and related methods and achieved superior performance.
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Key words
Image segmentation,Semi-supervised learning,Self-attention,Teacher-student model,Skeletal muscle
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