Fiber Bragg Grating for Temperature Monitoring During Medical Radiofrequency Treatments

Abstract In this work, it is proposed the integration of fiber optic sensors with commercial medical instrumentation, for temperature monitoring during tumor radiofrequency thermal ablation (RFTA) treatments. The heat propagation over the area under treatment is measured by means of a specific configuration, consisting of several Fiber Bragg Grating (FBG) sensors properly bounded to the RFTA probe and being positioned close to the region reached by RF electrodes. Our ex-vivo experiments on ex vivo animal liver and kidney, confirm that we were able to monitor in real time the temperature increase during different and consecutive RF discharges performed with the laparoscopic bipolar device Habib 4x, with a temperature resolution of 0.1C and a spatial resolution of 5mm.

[1]  N. Habib,et al.  Liver resection with bipolar radiofrequency device: Habib 4X. , 2008, HPB : the official journal of the International Hepato Pancreato Biliary Association.

[2]  Elfed Lewis,et al.  Fiber-optic chirped FBG for distributed thermal monitoring of ex-vivo radiofrequency ablation of liver. , 2014, Biomedical optics express.

[3]  A. Cusano,et al.  Thinned fiber Bragg gratings as refractive index sensors , 2005, IEEE Sensors Journal.

[4]  C. Brace,et al.  Tumor ablation: common modalities and general practices. , 2013, Techniques in vascular and interventional radiology.

[5]  S L Dawson,et al.  Tissue ablation with radiofrequency: effect of probe size, gauge, duration, and temperature on lesion volume. , 1995, Academic radiology.

[6]  Sergio Silvestri,et al.  Temperature monitoring during Laser Ablation by FBG sensors encapsulated within a metallic needle: Experiments on healthy swine tissue , 2015, 2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings.

[7]  Sergio Silvestri,et al.  Techniques for temperature monitoring during laser-induced thermotherapy: An overview , 2013, International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group.