Multi-fiber distributed thermal profiling of minimally invasive thermal ablation with scattering-level multiplexing in MgO-doped fibers

Aidana Beisenova, Aizhan Issatayeva, Sultan Sovetov, Sanzhar Korganbayev, Madina Jelbuldina, Zhannat Ashikbaeva, Wilfried Blanc, Emiliano Schena, Salvador Sales, Carlo Molardi, Daniele Tosi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

We propose a setup for multiplexed distributed optical fiber sensors capable of resolving temperature distribution in thermo-therapies, with a spatial resolution of 2.5 mm over multiple fibers interrogated simultaneously. The setup is based on optical backscatter reflectometry (OBR) applied to optical fibers having backscattered power significantly larger than standard fibers (36.5 dB), obtained through MgO doping. The setup is based on a scattering-level multiplexing, which allows interrogating all the sensing fibers simultaneously, thanks to the fact that the backscattered power can be unambiguously associated to each fiber. The setup has been validated for the planar measurement of temperature profiles in ex vivo radiofrequency ablation, obtaining the measurement of temperature over a surface of 96 total points (4 fibers, 8 sensing points per cm 2 ). The spatial resolution obtained for the planar measurement allows extending distributed sensing to surface, or even three-dimensional, geometries performing temperature sensing in the tissue with millimeter resolution in multiple dimensions.

Original languageEnglish
Article number#346894
Pages (from-to)1282-1296
Number of pages15
JournalBiomedical Optics Express
Volume10
Issue number3
DOIs
Publication statusPublished - Mar 1 2019

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics

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