投影角度受限制的超声波CT温度测量

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地的可靠性进行检验。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。

Ultrasonic CT for Temperature Measurements with Limited Projection Data based on Extrapolated FBP Method

This study uses ultrasound in combination with tomography to obtain three dimensional temperature measurements based on projection data obtained from limited projection angle. The main feature of the new CT reconstruction algorithm is to employ extrapolation to make up for the incomplete projection data on the basis of FBP method while the correlation between the projection data and Fourier Transform based extrapolation are taken into consideration. Computer simulation is conducted to verify the above algorithm. An experiment on 3D temperature distribution measurement is carried out to validate the proposed algorithm. According to the simulation and experimental results, the suggested CT algorithm is of utility in dealing with projection data from limited projection angle.