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本研究在投影角度受限制的情况下利用超声波CT完成三维温度测量。新CT再构成算法的主要特征如下 :在考虑到投影数据之间的相关性的同时、在傅里叶变换基础之上利用外插手法来补全不完整的投影数据。我们运用计算机模拟计算以及建立实验系统对上述算法的可靠性进行检验。根据计算机模拟计算和实验的结果 ,我们认为本研究所提出的CT算法可以有效地处理受投影角度限制的投影数据
In this study, the use of ultrasound CT to complete the three-dimensional temperature measurement in the projection angle is limited. The main features of the new CT reconstruction algorithm are as follows: Taking into account the correlation between the projection data, an extrapolation method is used to supplement the incomplete projection data based on the Fourier transform. We use computer simulation and the establishment of experimental system to test the reliability of the above algorithm. According to the results of computer simulation and experiment, we think the CT algorithm proposed in this study can effectively deal with the projection data limited by the projection angle