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- W4367190829 abstract "Needle positioning is essential for various medical applications such as epidural anaesthesia. Physicians rely on their instincts while navigating the needle in epidural spaces. Thereby, identifying the tissue structures may be helpful to the physician as they can provide additional feedback in the needle insertion process. To this end, we propose a deep neural network that classifies the tissues from the phase and intensity data of complex OCT signals acquired at the needle tip. We investigate the performance of the deep neural network in a limited labelled dataset scenario and propose a novel contrastive pretraining strategy that learns invariant representation for phase and intensity data. We show that with 10% of the training set, our proposed pretraining strategy helps the model achieve an F1 score of 0.84 whereas the model achieves an F1 score of 0.60 without it. Further, we analyse the importance of phase and intensity individually towards tissue classification." @default.
- W4367190829 created "2023-04-28" @default.
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- W4367190829 date "2023-04-26" @default.
- W4367190829 modified "2023-10-01" @default.
- W4367190829 title "Tissue Classification During Needle Insertion Using Self-Supervised Contrastive Learning and Optical Coherence Tomography" @default.
- W4367190829 doi "https://doi.org/10.48550/arxiv.2304.13574" @default.
- W4367190829 hasPublicationYear "2023" @default.
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