title: Towards high-resolution synchrotron radiation imaging with statistical iterative reconstruction.
abstract: Synchrotron radiation (SR) X-ray micro-computed tomography (CT) is an effective imaging modality for high-resolution investigation of small objects, with several applications in medicine, biology and industry. However, the limited size of the detector field of view (FOV) restricts the sample dimensions to only a few millimeters. When the sample size is larger than the FOV, images reconstructed using conventional methods suffer from DC-shift and low-frequency artifacts. This classical problem is known as the local tomography or the interior problem. In this paper, a statistical iterative reconstruction method is introduced to eliminate image artifacts resulting from the local tomography. The proposed method, which can be used in several SR imaging applications, enables high-resolution SR imaging with superior image quality compared with conventional methods. Real data obtained from different SR micro-CT applications are used to evaluate the proposed method. Results indicate a noteworthy quality improvement in the image reconstructed from the local tomography measurements.
authors.affiliation: Division of Information Engineering, Faculty of Engineering, Information and Systems, University of Tsukuba, Tsukuba 305-8573, Japan. essam@imagelab.cs.tsukuba.ac.jp
authors.forename: Essam A
authors.initials: EA
authors.lastname: Rashed
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kudo
mesh_terms: D000465:Algorithms; D000818:Animals; D016477:Artifacts; D051379:Mice; D011650:Pulmonary Alveoli / Q000648:ultrastructure; D013627:Talc / Q000737:chemistry; D055114:X-Ray Microtomography / Q000379:methods*
chemical_list: D013627:Talc