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Real-time monitoring of temperature using a pulsed laser-diode-based photoacoustic system.
- Source :
-
Optics letters [Opt Lett] 2020 Feb 01; Vol. 45 (3), pp. 718-721. - Publication Year :
- 2020
-
Abstract
- Tissue local temperature information is necessary for guiding energy-based medical treatments. In cancer treatments such as thermal therapy, heating is applied to local tissue to kill the tumor cells. These techniques require a temperature monitoring device with high sensitivity. In this Letter, we demonstrate a pulsed-laser-diode-(PLD)-based photoacoustic temperature sensing (PATS) system for monitoring tissue temperature in real time. The system takes advantage of a high repetition rate (7000 Hz), a near-infrared wavelength (803 nm), and a relatively high energy 1.42 mJ/pulse laser. The system is capable of providing local temperature information at high temporal resolution of 1 ms and high sensitivity of 0.31°C. The temperature data measured with a PLD-PATS system are compared with the data provided by the commercial fiber Bragg grating sensor. The proposed system will find applications in radio-frequency ablation, photothermal therapy, and focused ultrasound, etc., used for cancer treatments.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 45
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 32004293
- Full Text :
- https://doi.org/10.1364/OL.386173