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Updated: Feb 28, 2026

Photoacoustic Cystography
Published on: June 11, 2013
Coherent photoacoustic-ultrasound correlation and imaging
Fei Gao1, Xiaohua Feng1, Yuanjin Zheng1
1School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.
Abstract:
Both photoacoustics and ultrasound have been researched extensively but separately. In this letter, we report an initial study on the coherent correlation between pulsed photoacoustic wave and pulse-echo ultrasound wave. By illuminating an object with a pulsed laser and external ultrasound sequentially, both the endogenous photoacoustic wave and pulse-echo ultrasound wave are received and coherently correlated, demonstrating enhanced signal-to-noise ratio. Image contrast of the proposed coherent photoacoustic-ultrasound imaging is also demonstrated to be improved significantly on vessel-mimicking phantom, due to fusion of the optical absorption and ultrasound reflection contrasts by coherent correlation of either conventional laser-induced photoacoustic imaging or pulse-echo ultrasound imaging separately.
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