Photoacoustic signal recorded by photoacoustic imaging system can be modeled as convolution of initial photoacoustic response by the photoacoustic absorber with the system impulse response. Our goal was to compute the size of photoacoustic absorber using the initial photoacoustic response, deconvolved from the recorded photoacoustic data. For deconvolution, we proposed to use the impulse response of the photoacoustic system, estimated using discrete wavelet transform based homomorphic filtering. The proposed method was implemented on experimentally acquired photoacoustic data generated by different phantoms and also verified by a simulation study involving photoacoustic targets, identical to the phantoms in experimental study. The photoacoustic system impulse response, which was estimated using the acquired photoacoustic signal corresponding to a lead pencil, was used to extract initial photoacoustic response corresponding to a mustard seed of 0.65 mm radius. The recovered radius values of the mustard seed, corresponding to the experimental and simulation studies were 0.6 mm and 0.7 mm.

中文翻译：

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使用估计的系统脉冲响应从解卷积光声信号计算光声吸收器尺寸

光声成像系统记录的光声信号可以建模为光声吸收器的初始光声响应与系统脉冲响应的卷积。我们的目标是使用初始光声响应计算光声吸收器的大小，从记录的光声数据中解卷积。对于解卷积，我们建议使用光声系统的脉冲响应，使用基于离散小波变换的同态滤波估计。所提出的方法在由不同体模生成的实验获得的光声数据上实施，并通过涉及光声目标的模拟研究进行验证，与实验研究中的体模相同。光声系统脉冲响应，使用获得的对应于铅笔的光声信号进行估计，用于提取对应于半径为 0.65 毫米的芥菜籽的初始光声响应。芥菜籽的恢复半径值，对应于实验和模拟研究，分别为 0.6 毫米和 0.7 毫米。