Influence of fiber Bragg grating length on temperature measurements in laser-irradiated organs

Sara Pangaro, Paola Saccomandi, Carlo Massaroni, Sergio Silvestri, Emiliano Schena, Guido Costamagna, Francesco Maria Di Matteo, Michele Caponero, Andrea Polimadei

Research output: Contribution to conferencePaper

Abstract

The present study investigates the influence of uniform FBG length on temperature measurement under substantial temperature gradient. This analysis is particularly relevant in the scenario of laser ablation (LA), where the temperature gradient close to the optical applicator is significant (e.g., up to 50 °C/mm). Aiming to assess how the sensor length affects the measurement process in LA, both bench and ex vivo experiments were carried out by applying temperature gradient in the range 5 °C/cm-30 °C/cm on 1 mm-length FBG and 10 mm-length FBG. Results showed that the use of small-sized FBGs is recommended in LA for two main reasons: i) the spectrum reflected by shorter sensors has not shown significant alterations with the gradient. Alterations of the spectrum shape could compromise peak detection algorithms, and, therefore, the estimation of the actual temperature; ii) Arrays of shorter sensors can provide multipoint temperature measurements, with quiet good spatial resolution (e.g., 3 mm), by inserting a single fiber in the tissue.
Original languageEnglish
DOIs
Publication statusPublished - 4 Aug 2016
Externally publishedYes
Event11th IEEE International Symposium on Medical Measurements and Applications, MeMeA 2016 - Benevento, Italy
Duration: 4 Aug 2016 → …

Conference

Conference11th IEEE International Symposium on Medical Measurements and Applications, MeMeA 2016
CountryItaly
CityBenevento
Period4/8/16 → …

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All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Biomedical Engineering
  • Instrumentation

Cite this

Pangaro, S., Saccomandi, P., Massaroni, C., Silvestri, S., Schena, E., Costamagna, G., ... Polimadei, A. (2016). Influence of fiber Bragg grating length on temperature measurements in laser-irradiated organs. Paper presented at 11th IEEE International Symposium on Medical Measurements and Applications, MeMeA 2016, Benevento, Italy. https://doi.org/10.1109/MeMeA.2016.7533807