title: Fiber-optic chirped FBG for distributed thermal monitoring of ex-vivo radiofrequency ablation of liver.
abstract: A linearly chirped fiber Bragg grating (LCFBG) has been used as a temperature sensor for online monitoring of radiofrequency thermal ablation (RFTA). The LCFBG acts as a distributed sensor, with spatial resolution of 75 μm. A white-light setup that records the LCFBG spectrum estimates the temperature profile in real time. Three RFTA experiments have been performed ex-vivo on porcine liver measuring the radial temperature distribution during the heating process. The analysis of thermal maps quantifies the spatial heat distribution along the measurement axis and determines the ablation efficiency.
authors.affiliation: University of Limerick, Optical Fibre Sensors Research Centre (OFSRC), Limerick, Ireland.
authors.forename: Daniele
authors.initials: D
authors.lastname: Tosi
authors.affiliation: Universita' di Pavia, Dipartimento di Ingegneria Civile ed Architettura, via Ferrata 3, 27100 Pavia (PV), Italy.
authors.forename: Edoardo Gino
authors.initials: EG
authors.lastname: Macchi
authors.affiliation: Universita' di Pavia, Dipartimento di Ingegneria Civile ed Architettura, via Ferrata 3, 27100 Pavia (PV), Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: Gallati
authors.affiliation: Universita' di Pavia, Dipartimento di Ingegneria Civile ed Architettura, via Ferrata 3, 27100 Pavia (PV), Italy.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Braschi
authors.affiliation: Politecnico di Milano, Dipartimento di Meccanica, via La Masa 34, 20158 Milano (MI), Italy.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Cigada
authors.affiliation: IRCCS Policlinico San Matteo Foundation, VI Department of Internal Medicine, v.le Golgi 17, 27100 Pavia (PV), Italy.
authors.forename: Sandro
authors.initials: S
authors.lastname: Rossi
authors.affiliation: University of Limerick, Optical Fibre Sensors Research Centre (OFSRC), Limerick, Ireland.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Leen
authors.affiliation: University of Limerick, Optical Fibre Sensors Research Centre (OFSRC), Limerick, Ireland.
authors.forename: Elfed
authors.initials: E
authors.lastname: Lewis
keywords: (050.1590) Chirping; (060.2370) Fiber optics sensors; (060.3735) Fiber Bragg gratings; (120.6780) Temperature; (170.1020) Ablation of tissue