首页> 外文会议>Photons Plus Ultrasound: Imaging and Sensing 2006; Progress in Biomedical Optics and Imaging; vol.7, no.9 >Reconstruction of speed-of-sound and electromagnetic absorption distributions in photoacoustic tomography
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Reconstruction of speed-of-sound and electromagnetic absorption distributions in photoacoustic tomography

机译:重建光声层析成像中的声速和电磁吸收分布

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The conventional imaging model in photoacoustic tomography (PAT) assumes the object is acoustically homogeneous. In many practical applications of PAT this assumption may not be valid, resulting in image distortions and artifacts. Knowledge of the acoustic speed distribution of the object can be incorporated into the imaging model to mitigate such artifacts, but this information is not typically available. In this work, we propose a heuristic method for reconstructing both the acoustic speed and electromagnetic absorption distributions of a weakly scattering object. The method exploits a two-fold data redundancy that exists in a complete set of PAT measurement data. A preliminary computer-simulation study is presented to demonstrate the method.
机译:光声层析成像(PAT)中的常规成像模型假定对象在声学上是均匀的。在PAT的许多实际应用中,此假设可能无效,从而导致图像失真和伪影。可以将对象的声速分布的知识合并到成像模型中,以减轻此类伪影,但通常无法获得此信息。在这项工作中,我们提出了一种启发式方法来重建弱散射物体的声速和电磁吸收分布。该方法利用了一套完整的PAT测量数据中存在的双重数据冗余。进行了初步的计算机仿真研究以证明该方法。

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