Method for shape sensing an optical fiber

A method for shape sensing an optical fiber embedded within at least a portion of an interventional device comprises the steps of obtaining, from at least one strain sensor, strain based shape sensing data of the optical fiber; Correcting the strain based shape sensing data with a strain correction term; calculating a strain based reconstructed shape of the optical fiber based on the corrected strain based shape sensing data; and mapping the strain based reconstructed shape of the optical fiber in a coordinate system, wherein the strain correction term is a predetermined strain correction term derived from comparing a previous strain based reconstructed shape of the optical fiber with additional information related to the shape of the optical fiber obtained from an additional information source other than the at least one strain sensor. Following mapping the strain based reconstructed shape in the coordinate system, the method comprises checking if a new set of the additional information related to the shape of the optical fiber is available and updating the predetermined strain correction term based on a comparison of the mapped strain based reconstructed shape of the optical fiber with a reconstructed shape of the optical fiber based on the new set of the additional information in the coordinate system.

Patent Publication Number: WO2022136696

Year filing: 2021

Year approval: 2023

Year publication: 2022

Status: Requested

Technology domains: Measurement, Medical technology

Validated for IOF-key: Yes

Attributed to: Associatie KULeuven