Design and Simulation Study of a CNT-Based Multisource Cubical CT System for Dynamic Objects. (30th August 2018)

• Record Type: Journal Article
• Authors: Gong, Changcheng; Zeng, Li; Wang, Chengxiang; Ran, Lei
• Other Names: Checco Antonio Academic Editor.
• Is Part Of: Scanning. Volume 2018(2018)
• Publication Date: 2018-08-30
• Subjects: Scanning electron microscopy -- Periodicals; 502.825
• DOI: 10.1155/2018/6985698
• Languages: English
• ISSNs: 0161-0457

Abstract

Abstract : 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.