Photoacoustic Tomography Reconstruction in a 2-D Chaotic Cavity using Time Reversal

摘要

In photoacoustic tomography, a scanning setup or an array of transducers is usually needed to record the photoacoustic signal on a closed trajectory surrounding the region of interest. Such a measurement configuration may increase the complexity or expense of the photoacoustic tomography system. In this study, a one-channel photoacoustic tomography using time reversal invariance of photoacoustics in a chaotic cavity is proposed. In no need of the scanning setup or transducer array, the method utilizes only one fixed small-size transducer to collect the photoacoustics in the cavity. The method is verified by two-dimensional numerical simulations. Moreover, the influence of noise and the diameter of the transducer are also taken into account to verify the robustness and practicality of the proposed method. The proposed method could be helpful for improving the image quality of photoacoustic tomography using a few data channels.