Thermal strain between ultrashort laser pulse and tumor using finite element analysis

Jiahao Zeng; Ao Teng; Xianlin Song

doi:10.1117/12.2596686

12 September 2021 Thermal strain between ultrashort laser pulse and tumor using finite element analysis

Jiahao Zeng, Ao Teng, Xianlin Song

Proceedings Volume 11876, Optical Instrument Science, Technology, and Applications II; 1187608 (2021) https://doi.org/10.1117/12.2596686
Event: SPIE Optical Systems Design, 2021, Online Only

Abstract

Photoacoustic imaging technology is an emerging functional imaging method in the field of biomedical applications. It combines the light absorption characteristics of tissues with the advantages of ultrasonic detection, and has the advantages of strong contrast, high sensitivity, and deep imaging depth. Therefore, this article uses the finite element software COMSOL Multiphysics to study the thermal expansion process of the photoacoustic effect caused by the interaction of ultrashort laser pulses with tissues. In COMSOL, a laser with a pulse width of 5 ns and a wavelength of 532 nm is used as the excitation light source. Use mathematics module, heat transmission module, solid mechanics module and pressure acoustics module to simulate the process of photothermal conversion-thermal expansion-generation of ultrasound in the photoacoustic imaging of the Gastric tissue-tumor system. In this way, the photoacoustic signal and its image are obtained. This research focuses on exploring the thermal expansion process in the photoacoustic effect.

Conference Presentation

Citation Download Citation

Jiahao Zeng, Ao Teng, and Xianlin Song "Thermal strain between ultrashort laser pulse and tumor using finite element analysis", Proc. SPIE 11876, Optical Instrument Science, Technology, and Applications II, 1187608 (12 September 2021); https://doi.org/10.1117/12.2596686

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