Abstract
Temperature mapping is a key asset in supporting the clinician during thermal ablation (TA) treatment of tumors without adding additional risk to the TA procedure. Herein we report our experiments on multidimensional thermal mapping during radio frequency (RF) thermal ablation treatments of an ex-vivo animal organ. The temperature was monitored using several arrays of fiber Bragg gratings properly positioned around the RF applicator. The results show the effectiveness of our proposed method at assessing the TA probe depth and demonstrating how the insertion depth directly influences the maximum temperature and the treated area of the radio frequency ablation.
Highlights
Radiofrequency ablation (RFA) for removal of solid tumors is a minimally invasive thermoablative technique applied to the field of surgical oncology [1]
The fiber Bragg grating sensors (FBGs) sensors had been previously thermally characterized resulting in thermal sensitivity coefficients (ST) between 6.4·10−6 and 6.7·10−6 °C−1. 3.1 Experiments on ex vivo animal liver Figure 3 shows the results of two radio frequency (RF) discharges on the ex vivo animal liver
During the second discharge performed on another organ region, a temperature above 120 °C was recorded; the maximum peak was experienced by the FBG of array A positioned at −0.70 cm, probably due to the proximity of the needle to the application area of the RFA
Summary
Radiofrequency ablation (RFA) for removal of solid tumors is a minimally invasive thermoablative technique applied to the field of surgical oncology [1]. RFA procedures can be applied percutaneously in both laparoscopic and open surgery, and are applicable to several types of tumors such as liver, kidney and lung, as well as in treating metastases such as hepatic metastases due to colorectal cancer [2,3,4,5]. RFA consists of electrodes inserted into a lesion which cause an electrical current flow This phenomenon leads to frictional agitation at the ionic level and a consequent heat generation known as the Joule effect [1]. Thermal treatment brings about a localized increment of the organ’s temperature with consequent tissue dehydration and water vaporization. In this way coagulation necrosis takes place; a term used to describe the irreversible thermal damage which biological tissues undergo. RFA’s aim is to destroy cancerous cells by exposing them to cytotoxic temperature while sparing the adjacent healthy tissue
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
