Development of Continuous-Time Dynamical Reconstruction Method for High-Quality CT Image

提出了一种用于医用CT的连续时间动态图像重建(CIR)系统，通过理论分析、数值分析、模拟电路样机的建立和实际X射线CT扫描仪的数值实验对该系统进行了研究。我们的CIR系统可以重建与迭代方法几乎相同的质量的图像，而不会产生白色折线伪影和不需要的负像素值。结果表明，使用为CIR系统定制的硬件可以减少临床CT扫描中人体的X射线剂量。

A continuous-time dynamic image reconstruction(CIR) system for medical computed tomography(CT) was proposed, and it was investigated through theoretical analysis, numerical analysis, creation of a prototype consisting of analog electronic circuits, and numerical experiments using a real X-ray CT scanner. Our CIR system could reconstruct images with almost the same quality as those of iterative methods without production of whitish broken-line artifacts and undesired negative pixel values. The results indicate that the use of hardware customized for the CIR system can reduce X-ray doses for a human body in clinical CT scanning.