Curvature detection in a medical needle using a Fabry-Perot cavity as an intensity sensor

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Novais, S (Author) Other; Susana Silva (Author) FCUP; Frazao, O (Author) FCUP

Journal

Title: Measurement: Journal of the International Measurement Confederation

Vol. 151

ISSN: 0263-2241

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00R-89P

DOI: 10.1016/j.measurement.2019.107160

Abstract (EN): The use of optical sensors inside the needle can improve targeting precision and can bring real-time information about the location of the needle tip if necessary, since a needle bends through insertion into the tissue. Therefore, the precise location of the needle tip is so important in percutaneous treatments. In the current experiment, a fiber sensor based on a Fabry-Perot (FP) cavity is described to measure the needle curvature. The sensor is fabricated by producing an air bubble between two sections of multimode fiber. The needle with the sensor therein was attached at one end and deformed by the application of movements. The sensor presents a sensitivity of -0.152 dB/m(-1) to the curvature measurements, with a resolution of 0.089 m(-1). The sensory structure revealed to be stable, obtaining a cross-sensitivity to be 0.03 m(-1)/degrees C.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5