Quantitative comparison of photothermal effects induced by pulsed lasers with optical coherence tomography

Tai-Ang Wang; Hsiang-Chieh Lee; Chau Yee Ng; Meng-Tsan Tsai

doi:10.1117/12.2609281

7 March 2022 Quantitative comparison of photothermal effects induced by pulsed lasers with optical coherence tomography

Tai-Ang Wang, Hsiang-Chieh Lee, Chau Yee Ng, Meng-Tsan Tsai

Proceedings Volume 11934, Photonics in Dermatology and Plastic Surgery 2022; 119340C (2022) https://doi.org/10.1117/12.2609281
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

In this study, we compared the photothermal effects induced by the pulsed lasers including a fractional CO2 laser (=10600 nm) and a nanosecond Nd:YAG laser (=1064 nm). To investigate the induced photothermal effect, a spectral-domain optical coherence tomography (SD-OCT) system with a central wavelength of 840 nm was used to acquire 3D images of skin before and after the laser treatment. From the OCT results, the microscopic ablation zone (MAZ) resulted from the fractional CO2 laser can be identified that caused a stripe-shape photodamage on skin, ranging from the epidermis layer to the dermis layer. In contrast, the intra-dermal laser-induced optical breakdown (LIOB) induced by the nanosecond pulsed laser can also be observed from the OCT results.

Conference Presentation

Citation Download Citation

Tai-Ang Wang, Hsiang-Chieh Lee, Chau Yee Ng, and Meng-Tsan Tsai "Quantitative comparison of photothermal effects induced by pulsed lasers with optical coherence tomography", Proc. SPIE 11934, Photonics in Dermatology and Plastic Surgery 2022, 119340C (7 March 2022); https://doi.org/10.1117/12.2609281

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