Bibliographic Details
| Title: |
Unsupervised Anomaly Detection on Implicit Shape representations for Sarcopenia Detection |
| Authors: |
Piecuch, Louise, Huet, Jeremie, Frouin, Antoine, Nordez, Antoine, Boureau, Anne-Sophie, Mateus, Diana |
| Source: |
2025 IEEE International Symposium on Biomedical Imaging |
| Publication Year: |
2025 |
| Collection: |
Computer Science |
| Subject Terms: |
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning |
| More Details: |
Sarcopenia is an age-related progressive loss of muscle mass and strength that significantly impacts daily life. A commonly studied criterion for characterizing the muscle mass has been the combination of 3D imaging and manual segmentations. In this paper, we instead study the muscles' shape. We rely on an implicit neural representation (INR) to model normal muscle shapes. We then introduce an unsupervised anomaly detection method to identify sarcopenic muscles based on the reconstruction error of the implicit model. Relying on a conditional INR with an auto-decoding strategy, we also learn a latent representation of the muscles that clearly separates normal from abnormal muscles in an unsupervised fashion. Experimental results on a dataset of 103 segmented volumes indicate that our double anomaly detection strategy effectively discriminates sarcopenic and non-sarcopenic muscles. |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/2502.09088 |
| Accession Number: |
edsarx.2502.09088 |
| Database: |
arXiv |
