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Title: Real-time monitoring of temperature using a pulsed laser-diode-based photoacoustic system
Authors: Upputuri, Paul Kumar
Das, Dhiman
Maheshwari, Muneesh
Yang, Yaowen
Pramanik, Manojit
Keywords: Engineering::Bioengineering
Issue Date: 2020
Source: Upputuri, P. K., Das, D., Maheshwari, M., Yang, Y., & Pramanik, M. (2020). Real-time monitoring of temperature using a pulsed laser-diode-based photoacoustic system. Optics Letters, 45(3), 718-721. doi:10.1364/OL.386173
Journal: Optics Letters
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.
ISSN: 1539-4794
DOI: 10.1364/OL.386173
Rights: © 2020 Optical Society of America (OSA). All rights reserved. This paper was published in Optics Letters and is made available with permission of Optical Society of America (OSA).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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