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A Temperature-Controlled Laser Hot Needle With Grating Sensor for Liver Tissue Tract Ablation.
- Source :
-
IEEE Transactions on Instrumentation & Measurement . Sep2020, Vol. 69 Issue 9, p7119-7124. 6p. - Publication Year :
- 2020
-
Abstract
- 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 ~50-mm × ~ 6-mm (length × width) thermal denaturation zone has been created on ex vivo bovine liver tissue with the laser hot needle at 150 °C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189456
- Volume :
- 69
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Instrumentation & Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 145160031
- Full Text :
- https://doi.org/10.1109/TIM.2020.2978920