title: Geometric calibration of a micro-CT system and performance for insect imaging.
abstract: Micro-CT with a high spatial resolution in combination with computer-based-reconstruction techniques is considered a powerful tool for morphological study of insects. The quality of CT images crucially depends on the precise knowledge of the scan geometry of the micro-CT system. In this paper, we have proposed a method to calculate the deviation of rotating axis for compensating deficiency of existing methods. A practical application of this geometric calibration method of the micro-CT system for insect imaging is presented. We have performed the computer-simulation study and experimental study with our prototype micro-CT system. The results demonstrate that the proposed technique is accurate and robust. In addition, we have evaluated the imaging characteristics of the detector in terms of modulation-transfer function (MTF). Finally, insect imaging performance and image reconstruction from data acquired with different energies are presented.
authors.affiliation: Paul Lauterbur Center for Biomedical Imaging Research, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China. zl.hu@siat.ac.cn
authors.forename: Zhanli
authors.initials: Z
authors.lastname: Hu
authors.forename: Jianbao
authors.initials: J
authors.lastname: Gui
authors.forename: Jing
authors.initials: J
authors.lastname: Zou
authors.forename: Junyan
authors.initials: J
authors.lastname: Rong
authors.forename: Qiyang
authors.initials: Q
authors.lastname: Zhang
authors.forename: Hairong
authors.initials: H
authors.lastname: Zheng
authors.forename: Dan
authors.initials: D
authors.lastname: Xia
mesh_terms: D000465:Algorithms; D000818:Animals; D002138:Calibration; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D007313:Insecta / Q000033:anatomy & histology*; D019047:Phantoms, Imaging; D055114:X-Ray Microtomography / Q000295:instrumentation / Q000379:methods / Q000592:standards*