Spectrum analysis of acousto-optic signal modulated by ultrasound at different frequency in scattering medium

Lili Zhu; Dongqing Peng; Xiaoman Zhang; Hui Li

doi:10.1117/12.2574000

10 October 2020 Spectrum analysis of acousto-optic signal modulated by ultrasound at different frequency in scattering medium

Lili Zhu, Dongqing Peng, Xiaoman Zhang, Hui Li

Author Affiliations +

Proceedings Volume 11553, Optics in Health Care and Biomedical Optics X; 1155329 (2020) https://doi.org/10.1117/12.2574000
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

Ultrasound-modulated optical tomography (UOT) combines optical and acoustic techniques, and has high spatial resolution of ultrasonic location and high sensitivity of optical detection. In this technique, a focused ultrasound is used to locate and label the scattered light. It determines the spatial resolution of UOT and the modulation efficiency of the scattering light. Four kinds of acousto-optic signals modulated by 1, 2.25, 5, and 10 MHz center frequencies of impulse ultrasound are obtained in this letter. The frequency spectrum of these four kinds of acousto-optic signals are achieved by Fast Fourier Transform (FFT). By analyzing the spectrum information of acousto-optic signals modulated by ultrasound at different frequencies, we can find useful feature information and choose an appropriate parameter of ultrasonic probe to improve the signal-to-noise ratio and sensitivity of UOT.

Citation Download Citation

Lili Zhu, Dongqing Peng, Xiaoman Zhang, and Hui Li "Spectrum analysis of acousto-optic signal modulated by ultrasound at different frequency in scattering medium", Proc. SPIE 11553, Optics in Health Care and Biomedical Optics X, 1155329 (10 October 2020); https://doi.org/10.1117/12.2574000

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