Probe Fusion All-optic OCT-PAM Dual-mode Imaging System for Biomedical Imaging

Overview

Journal Photoacoustics

Date 2024 Jul 26

PMID 39055738

Authors

Ning Ding

Huiwen Jiang

Ben Xiang

Yao Yu

Cheng Ji

Jian Liu

Yuqian Zhao

Jingmin Luan

Yanqiu Yang

Yi Wang

Zhenhe Ma

Affiliations

Soon will be listed here.

Abstract

We proposed a non-contact photoacoustic (PA) detection method using spectral domain optical coherence tomography (SDOCT). Two interference spectrums (A-lines) were acquired before and after the PA excitation with SDOCT. PA signal propagated within the sample causing the vibration. The vibration inner the sample introduced phase change between the acquired two A-lines. Thus, the PA signal can be detected by evaluating the difference in phase between the two A-lines. Based on the method, an OCT-PAM dual-mode imaging system was constructed. In the system, SDOCT served as the detection unit for PAM. Thus, the combination of the two imaging modalities was simplified. Another advantage of the system is that it realizes non-contact all-optic detection, which is attractive for biomedical imaging. Using the system, we imaged phantoms of carbon fibers, asparagus leaves and human hairs. Furthermore, the cortical vasculature of rat was imaged and the flow status was evaluated quantitatively.

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