Abstract
Photoacoustic tomography is an emerging biomedical imaging method, which has a high image contrast and good spatial resolution in deep tissues. Because of these merits, PAT has broad applications in biomedical imaging. However, acoustic scattering is unavoidable in tissue with inhomogeneous acoustic properties. Acoustic scattering brings a challenge for the applications of PAT. A new PAT method is presented to obtain the photoacoustic images in scattering tissue. This method is based on the time-reversal invariance of acoustic wave propagation during the acoustic scattering process. Both numerical simulations and experiments are used to validate this method. The results show that the proposed method can provide better PAT images in scattering tissues than the traditional photoacoustic tomography. Therefore, this method could serve as an alternative for imaging inhomogeneous biological tissues with acoustic scattering.
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