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We present numerical simulations for modelling optoacoustic (OA) signalsobserved in PVA hydrogel tissue phantoms. We review the computational approachto model the underlying mechanisms, i.e. optical absorption of laser energy andacoustic propagation of mechanical stress, geared towards experiments thatinvolve absorbing media only. We apply the numerical procedure to model signalsobserved in the acoustic near- and farfield in both, forward and backwarddetection mode, in PVA hydrogel tissue phantoms (i.e. an elastic solid).Further, we illustrate the computational approach by modeling OA signal forseveral experiments on dye solution (i.e. a liquid) reported in the literature,and benchmark the research code by comparing our fully 3D procedure to limitingcases described in terms of effectively 1D approaches.

Detection and numerical simulation of optoacoustic near- and farfield signals observed in PVA hydrogel phantoms