光声信号的声透镜层析成像研究

提出了一种用声透镜实现光声层析成像的新模式。从理论上计算出了声透镜的响应，测出了已知声场中标准物像面处的声场分布。考虑到圆形活塞振源的指向性，对代表物成像进行了理论修正，并与实验结果做了对比分析。研究表明，利用声透镜可以实现光声层析成像，并经图像重构得到了生物组织中异物的光声图像，横向、纵向分辨力较高。

Studies on Acoustic Lens Imaging of Photoacoustic Signal

A new photoacoustic tomographic imaging mode by using acoustic lens directly imaging is put forward, acoustic lens response is figured out and distribution of criterion sample at image plane in a known sound field is measured. Considering sound resource point of cylinder piston, a theoretical correction to sample imaging is carried out and the results are analysed. Investigation indicates that it is feasible for photoacoustic tomographic imaging by acoustic lens. By picture reconstruction, the images of eyewinker in tissue are obtained. The axial resolution and transverse resolution are very high.