Abstract: According to questions in concrete quality testing，a new ultrasound CT array testing method is adopted.Based on study of ultrasound spreading character in concrete，linear traveltime interpolation algorithm is intruduced in ultrasound CT.The line-array of SIRT algorithm is improved.A surround array of reconstruction algorithm has been used.Through simulation，the results show that CT images are feasible and the effect of image reconstruction is satisfactory.

摘要： 针对超声波在混凝土检测中存在的问题，采用了一种新的超声CT阵列检测方法。在研究超声在混凝土中传播特性的基础上，将射线追踪算法引入到层析成像中，对线阵式SIRT重建算法进行了改进，实现了环绕面阵式SIRT算法重建。通过数值仿真表明：采用上述方法能够明显改善层析成像效果。