1. Unsupervised Region-Based Anomaly Detection In Brain MRI With Adversarial Image Inpainting
- Author
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Chris G. Willcocks, Adam Feldman, Sarath Bethapudi, Andrew Jennings, and Bao Nguyen
- Subjects
FOS: Computer and information sciences ,Computer science ,Computer Vision and Pattern Recognition (cs.CV) ,Computer Science - Computer Vision and Pattern Recognition ,Inpainting ,02 engineering and technology ,Iterative reconstruction ,010501 environmental sciences ,01 natural sciences ,Convolutional neural network ,Standard deviation ,FOS: Electrical engineering, electronic engineering, information engineering ,0202 electrical engineering, electronic engineering, information engineering ,Segmentation ,0105 earth and related environmental sciences ,I.4.0 ,I.5.0 ,business.industry ,Image and Video Processing (eess.IV) ,Contrast (statistics) ,Pattern recognition ,Image segmentation ,Electrical Engineering and Systems Science - Image and Video Processing ,020201 artificial intelligence & image processing ,Anomaly detection ,Artificial intelligence ,business - Abstract
Medical segmentation is performed to determine the bounds of regions of interest (ROI) prior to surgery. By allowing the study of growth, structure, and behaviour of the ROI in the planning phase, critical information can be obtained, increasing the likelihood of a successful operation. Usually, segmentations are performed manually or via machine learning methods trained on manual annotations. In contrast, this paper proposes a fully automatic, unsupervised inpainting-based brain tumour segmentation system for T1-weighted MRI. First, a deep convolutional neural network (DCNN) is trained to reconstruct missing healthy brain regions. Then, upon application, anomalous regions are determined by identifying areas of highest reconstruction loss. Finally, superpixel segmentation is performed to segment those regions. We show the proposed system is able to segment various sized and abstract tumours and achieves a mean and standard deviation Dice score of 0.771 and 0.176, respectively., Comment: 5 pages, 6 figures
- Published
- 2021