超声衍射CT及其在不完全投影条件下的实验研究

超声衍射层析成像术是一种利用声波散射数据所携带的信息来反演物体内部结构的技术，具有广泛的应用前景。本文对这一领域的研究现状进行综述，慨述一些典型的超声衍射层析成像重构方法，同时探讨在残缺投影数据下的重构问题，对于不完全投影数据下的图像重构进行了实验研究。最后对实验结果进行讨论。

Ultrasound diffraction CT:Experimental study on reconstruction with incomplete projection data

Ultrasound diffraction computer tomography (UDCT) is an image reconstruction technique that uses scattering data to reconstruct the cross-sectional image of an insonified object. This paper reviews recent advances in UDCT image reconstruction, and briefly describes some typical methods with special focus on techniques based on incomplete projection data. An experimental study has been carried out on ill-conditioned problems with incomplete data. The results show that acceptable reconstruction is obtainable under some restrained conditions.