Papers › Dimensionality Reduction for Improving Out-of-Distribution Detection in Medical Image...

Dimensionality Reduction for Improving Out-of-Distribution Detection in Medical Image Segmentation

7 Aug 2023arXiv:2308.03723archive 2025-07-28

McKell Woodland, Nihil Patel, Mais Al Taie, Joshua P. Yung, Tucker J. Netherton, Ankit B. Patel, Kristy K. Brock

Clinically deployed segmentation models are known to fail on data outside of their training distribution. As these models perform well on most cases, it is imperative to detect out-of-distribution (OOD) images at inference to protect against automation bias. This work applies the Mahalanobis distance post hoc to the bottleneck features of a Swin UNETR model that segments the liver on T1-weighted magnetic resonance imaging. By reducing the dimensions of the bottleneck features with principal component analysis, OOD images were detected with high performance and minimal computational load.

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