A temperature-controlled laser hot needle with grating sensor for liver tissue tract ablation

Abd Raziff, Hani Hareiza and Tan, Daryl and Lim, Kok-Sing and Yeong, Chai Hong and Wong, Yin How and Abdullah, Basri Johan Jeet and Sulaiman, Norshazriman and Ahmad, Harith (2020) A temperature-controlled laser hot needle with grating sensor for liver tissue tract ablation. IEEE Transactions on Instrumentation and Measurement, 69 (9). pp. 7119-7124. ISSN 0018-9456, DOI https://doi.org/10.1109/TIM.2020.2978920.

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In this article, we proposed a laser hot needle for liver tissue tract ablation. The proposed laser hot needle is powered by a 4500-nm-diode laser incorporated with a closed-loop control system that comprises of a uniform fiber Bragg grating (FBG) temperature sensor and a computer. Based on the real-time feedback input from the FBG temperature sensor, the laser power is regulated by a proportional-integral-derivative (PID) control system to control the needle temperature. In the characterization test, a chirped grating-based distributed temperature sensor is employed for measuring the tissue temperature profile in the ex vivo bovine liver tissue during the ablation. A histological test is conducted to study the impact of tract ablation to the cellular structures of treated tissue and tissue coagulation. In a tract ablation test, a similar to 50-mm x similar to 6-mm (length x width) thermal denaturation zone has been created on ex vivo bovine liver tissue with the laser hot needle at 150 degrees C.

Item Type: Article
Funders: Taylor’s University
Uncontrolled Keywords: Biomedical device; Control system; Fiber Bragg grating (FBG) sensor; Medical laser device; Tissue ablation
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms Zaharah Ramly
Date Deposited: 27 Nov 2023 02:46
Last Modified: 27 Nov 2023 02:46
URI: http://eprints.um.edu.my/id/eprint/36413

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