3D shape sensing medical needle based on the multiplexing of optical backscattering reflectometry

Carlo Molardi; Aizhan Issatayeva; Aidana Beisenova; Wilfried Blanc; Daniele Tosi

doi:10.1117/12.2537302

20 November 2019 3D shape sensing medical needle based on the multiplexing of optical backscattering reflectometry

Carlo Molardi, Aizhan Issatayeva, Aidana Beisenova, Wilfried Blanc, Daniele Tosi

Proceedings Volume 11191, Advanced Sensor Systems and Applications IX; 111910A (2019) https://doi.org/10.1117/12.2537302
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

Optical Backscattering Reflectometry (OBR) can be used for one-dimensional distributed strain sensing of medical needles. To achieve 3D shape sensing the needle should be equipped with multiple optical fibers. A feasible configuration can be done using two pairs of parallel optical fibers, which will measure the strain in two directions perpendicular to a needle axis. However, OBR is limited to a single fiber sensing because of its inability to discriminate scattering patterns of different fibers. To achieve multiplexing, it is proposed to use nanoparticle doped fibers (NP-doped) with high scattering power and splice them to standard single-mode (SMF) pigtails with different lengths. As a result of such configuration, the NP-doped fibers, which are used as sensing fibers, are spatially separated by standard fibers.

Citation Download Citation

Carlo Molardi, Aizhan Issatayeva, Aidana Beisenova, Wilfried Blanc, and Daniele Tosi "3D shape sensing medical needle based on the multiplexing of optical backscattering reflectometry", Proc. SPIE 11191, Advanced Sensor Systems and Applications IX, 111910A (20 November 2019); https://doi.org/10.1117/12.2537302

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