The purpose of this paper is to design and simulate a new computed tomography (CT) system with a high temporal resolution for dynamic objects. We propose a multisource cubical CT (MCCT) system with X-ray tubes and detectors installed on a cube. Carbon nanotube- (CNT-) based X-ray focal spots are distributed on the twelve edges of the cube. The distribution of X-ray focal spots and detectors completely avoids mechanical movements to scan an object under inspection. CNTs are excellent electron field emitters because the use of a “cold” cathode makes it possible to fabricate a cathode with multiple electron emission points, and the CNT-based X-ray focal spots possess little response time and programmable emission. The proposed rotation-free MCCT system can acquire a high scanning speed when using a high frame rate detector. A three-dimensional (3D) reconstruction algorithm with tensor framelet-based L0-norm (TF-L0) minimization is developed for the simulation study of the MCCT. Simulation experiment results demonstrate the feasibility of the MCCT system.

中文翻译：

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基于碳纳米管的动态物体多源立体CT系统设计与仿真研究

本文的目的是为动态物体设计和模拟一种具有高时间分辨率的新型计算机断层扫描 (CT) 系统。我们提出了一种多源立方 CT (MCCT) 系统，其中 X 射线管和探测器安装在立方体上。基于碳纳米管 (CNT-) 的 X 射线焦点分布在立方体的十二个边缘上。X 射线焦点和探测器的分布完全避免了扫描被检查对象的机械运动。碳纳米管是出色的电子场发射器，因为使用“冷”阴极可以制造具有多个电子发射点的阴极，并且基于碳纳米管的 X 射线焦点具有很小的响应时间和可编程发射。当使用高帧率检测器时，所提出的无旋转 MCCT 系统可以获得高扫描速度。开发了一种基于张量框架的 L0 范数 (TF-L0) 最小化的三维 (3D) 重建算法，用于 MCCT 的模拟研究。仿真实验结果证明了MCCT系统的可行性。