超声CT法无损测温

Ultrasonic Computed Tomography for Noninvasive Temperature Measurement

本文研究了测温用的超声CT算法,分析了测量精度和时间,运用两种迭代法讨论了声波受到人体内骨骼、空气阻碍时,投影数据缺损情况下的超声CT重建算法。文中还进一步研究了超声衍射CT;在卷积——反传播法的基础上,提出一种新的投影数据缺损时超声衍射CT算法,并给出了计算机仿真的结果.

A method for measuring the internal temperature of the human body by ultrasonic computed tomography UCT is presented. The measurement of tem- perature was carried out by using a proper model, which corresponds to an ultra- sonic CT arithmatic calculation process. The precision of the measurement and the duration of UCT calculation were analyzed. Two methods of reiteration for the incomplete data due to wave propagation obstructed by bones or air have been adopted. Furthermore, the diffraction UCT with the convolution back-propaga- tion method has also been discussed. A new method for diffraction UCT in the case of obstructed data and the results from computer simulation have been given.