METHOD FOR DISTRIBUTED TEMPERATURE SENSING DURING THERMAL ABLATION OF A TUMOUR USING A FIBRE OPTIC TEMPERATURE SENSOR WITH A LINEARLY CHIRPED BRAGG GRATING

摘要

The invention relates to medicine, and more particularly to oncology, and is intended for temperature sensing during thermal ablation of a tumour. The aim of the invention is to develop an effective and highly accurate method for temperature sensing during thermal ablation of a tumour. The technical result is an improvement in treatment quality owing to increased precision in the thermal ablation of tumours. This technical result is achieved in that the claimed method includes mounting a fibre optic temperature sensor with a linearly chirped (the period of the refractive index variation increases in arithmetic progression) Bragg grating having a length of 1.4-6 cm and a diameter of 80-300 microns directly on a tumour using a catheter. A light spectrum which is backscattered by the Bragg grating in accordance with the temperature acting on the sensor is passed through the fibre optic sensor having a length of 1.4-6 cm and a diameter of 80-300 microns. A temperature profile is then constructed on a computer using a programme for decoding the reflected light spectrum, developed in accordance with the parameters of the fibre optic cable.