Fiber-optic combined FPI/FBG sensors for monitoring of radiofrequency thermal ablation of liver tumors: Ex vivo experiments

Daniele Tosi, Edoardo Gino Macchi, Giovanni Braschi, Alfredo Cigada, Mario Gallati, Sandro Rossi, Sven Poeggel, Gabriel Leen, Elfed Lewis

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

We present a biocompatible, all-glass, 0.2 mm diameter, fiber-optic probe that combines an extrinsic Fabry-Perot interferometry and a proximal fiber Bragg grating sensor; the probe enables dual pressure and temperature measurement on an active 4 mm length, with 40 Pa and 0.2°C nominal accuracy. The sensing system has been applied to monitor online the radiofrequency thermal ablation of tumors in liver tissue. Preliminary experiments have been performed in a reference chamber with uniform heating; further experiments have been carried out on ex vivo porcine liver, which allowed the measurement of a steep temperature gradient and monitoring of the local pressure increase during the ablation procedure.

Original languageEnglish
Pages (from-to)2136-2144
Number of pages9
JournalApplied Optics
Issue number10
DOIs
Publication statusPublished - Apr 1 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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