We report on experimental demonstration of thermoacoustic tomography for quantitatively reconstructing the conductivity images of heterogeneous media. Thermoacoustic images are obtained from a series of tissue-like phantom experiments using a finite element-based reconstruction algorithm coupled with a scanning thermoacoustic imaging system. The experimental results show that conductivity images can be quantitatively reconstructed based on the finite-element (FE) solution to the Helmholtz electromagnetic wave equation coupled with the thermoacoustic wave equation.
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Huang et al. (2012) studied this question.