Journal ArticleDOI
Direct computed tomographic reconstruction for directional-derivative projections of computed tomography of diffraction enhanced imaging
Zhifeng Huang,Kejun Kang,Li Zheng,Peiping Zhu,Qingxi Yuan,Wanxia Huang,Junyue Wang,Di Zhang,Ai-Min Yu +8 more
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TLDR
In this article, a direct reconstruction algorithm for directional-derivative projections of computed tomography of diffraction enhanced imaging is proposed, which does not require any restoration processing compared with the current two-step methods.Abstract:
X-ray diffraction enhanced imaging based on synchrotron radiation has extremely high sensitivity of weakly absorbing low-Z samples in medical and biological fields. This letter is dedicated to a direct reconstruction algorithm for directional-derivative projections of computed tomography of diffraction enhanced imaging. It is a “one-step” algorithm and does not require any restoration processing compared with the current “two-step” methods. The actual values of the sample’s refractive index decrement can be estimated from its reconstruction images directly. The algorithm is proven by the actual experiment at the Beijing Synchrotron Radiation Facility and the reconstructed images are described finally.read more
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Journal ArticleDOI
Algorithm Study on Reconstruction of Refractive Angles in Fan Beam Diffraction Enhanced Computed Tomography
TL;DR: Based on the 360° computing method of refractive angle for parallel beam diffraction enhanced imaging computed tomography (DE-CT) technique, a new algorithm used to calculate the refractive index gradient can be obtained by using the new algorithm with projection data of an object in the range of 0 − 360°, and the new method only needs to set the analyser at half slope position of the rocking curve.
References
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Book
Principles of Computerized Tomographic Imaging
TL;DR: Properties of Computerized Tomographic Imaging provides a tutorial overview of topics in tomographic imaging covering mathematical principles and theory and how to apply the theory to problems in medical imaging and other fields.
Book
Computed Tomography: Principles, Design, Artifacts, and Recent Advances
TL;DR: Introduction Preliminaries Image Reconstruction Image Presentation Key Performance Parameters of a CT Scanner Major Components of CT scanner Image Artifacts: Appearances, Causes, and Corrections Computer Simulation and Analysis.
Computed Tomography: Principles, Design, Artifacts, and Recent Advances, Fourth Edition
TL;DR: Introduction Preliminaries Image Reconstruction Image Presentation Key Performance Parameters of a CT Scanner Major Components of CT scanner Image Artifacts: Appearances, Causes, and Corrections Computer Simulation and Analysis.
Journal ArticleDOI
Diffraction enhanced x-ray imaging
Dean Chapman,W. Thomlinson,R. E. Johnston,David B. Washburn,Etta D. Pisano,Nicholas F. Gmur,Zhong Zhong,Ralf Hendrik Menk,Fulvia Arfelli,Dale E. Sayers +9 more
TL;DR: Diffraction enhanced imaging is a new x-ray radiographic imaging modality using monochromatic x-rays from a synchrotron which produces images of thick absorbing objects that are almost completely free of scatter.
Journal ArticleDOI
Computed tomography of x-ray index of refraction using the diffraction enhanced imaging method.
F.A. Dilmanian,Zhong Zhong,B. Ren,X. Y. Wu,Leroy Dean Chapman,Itzhak Orion,William Thomlinson +6 more
TL;DR: Diffraction enhanced imaging is a new, synchrotron-based, x-ray radiography method that uses monochromatic, fan-shaped beams, with an analyser crystal positioned between the subject and the detector, and has the potential for use in clinical radiography and in industry.