Abstract: Based on the research in ultrasound CT image principle, the authors explored the array detection method. By improving the layout of sensors, the amount of data required for imaging increased. Due to the least squared criterion, the formula of simultaneous iterative reconstruction techniques was deduced. The matrix of the coefficient correlation was obtained through algorithm for scanning four edges. The velocity matrix had been achieved through correcting error to approach the real data constantly. The result of simulation shows that the method can reduce error effectively, and the effect of image reconstruction is satisfactory.

Key words: Simultaneous Iterative Reconstruction Techniques (SIRT), array detector, velocity reconstruction, the least squared criterion

摘要： 在研究超声CT成像原理的基础上，对阵列检测方法进行了探讨。通过对探头布置方式的改进，增加了成像所需的数据量。基于最小二乘方准则，利用联合迭代重建算法，采用四边扫描算法求解相关系数矩阵，通过不断修正误差逼近真实值,进而实现速度矩阵的求取。数值仿真表明：采用上述方法能够明显减小重建误差，改善层析成像效果。

关键词: 联合迭代重建算法, 阵列检测, 速度重建, 最小二乘方准则