Results 41 to 50 of about 511,439 (299)
Identification of nonlinear beam-hardening effects in X-ray tomography [PDF]
arXiv, 2023 We study streaking artifacts caused by beam-hardening effects in X-ray computed tomography (CT). The effect is known to be nonlinear. We show that the nonlinearity can be recovered from the observed artifacts for strictly convex bodies. The result provides a theoretical support for removal of the artifacts.
arxiv
International Journal of Biomedical Imaging, 2006 Major heart diseases such as ischemia and hypertrophic myocardiopathy are accompanied with significant changes in the passive mechanical properties and active contractility of myocardium.
Yi Liu, Ge Wang, L. Z. Sun
doaj +1 more source
Observation of Bulk Plasticity in a Polycrystalline Titanium Alloy by Diffraction Contrast Tomography and Topotomography [PDF]
, 2021 The mechanical properties of polycrystalline metals are governed by the interaction of defects that are generated by deformation within the 3D microstructure. In materials that deform by slip, the plasticity is usually highly heterogeneous within the microstructure.
arxiv +1 more source
Investigating plywood behaviour in outdoor conditions [PDF]
, 2016 Moisture behaviour of plywood is investigated in combination with detailed structural analysis. In the lab, neutron radiography and X-ray computed tomography (X-ray CT) were used to map the moisture distribution and internal structure of plywood ...
De Windt, Imke +6 more
core +2 more sources
Multi-Mounted X-Ray Computed Tomography. [PDF]
PLoS ONE, 2016 Most existing X-ray computed tomography (CT) techniques work in single-mounted mode and need to scan the inspected objects one by one. It is time-consuming and not acceptable for the inspection in a large scale.
Jian Fu, Zhenzhong Liu, Jingzheng Wang
doaj +1 more source
High-speed X-ray ptychographic tomography
Scientific Reports, 2022 X-ray ptychography is a coherent scanning imaging technique widely used at synchrotron facilities for producing quantitative phase images beyond the resolution limit of conventional x-ray optics.
Darren Batey +2 more
doaj +1 more source
A LabVIEW® based generic CT scanner control software platform [PDF]
, 2010 UGCT, the Centre for X-ray tomography at Ghent University (Belgium) does research on X-ray tomography and its applications. This includes the development and construction of state-of-the-art CT scanners for scientific research. Because these scanners are
Boone, Matthieu +4 more
core +2 more sources
Algorithms for joint activity–attenuation estimation from positron emission tomography scatter
EJNMMI Physics, 2019 Background Attenuation correction in positron emission tomography remains challenging in the absence of measured transmission data. Scattered emission data may contribute missing information, but quantitative scatter-to-attenuation (S2A) reconstruction ...
Yannick Berker +2 more
doaj +1 more source
Lecture Notes on Computerized Tomography [PDF]
arXiv, 2023 These lecture notes give an introduction to the mathematics of computer(ized) tomography (CT). Treated are the imaging principle of X-ray tomography, the Radon transform as mathematical model for the measurement process and its properties, the ill-posedness of the underlying mathematical reconstruction problem and classical reconstruction techniques ...
arxiv
Meaning of Interior Tomography [PDF]
, 2013 The classic imaging geometry for computed tomography is for collection of un-truncated projections and reconstruction of a global image, with the Fourier transform as the theoretical foundation that is intrinsically non-local. Recently, interior tomography research has led to theoretically exact relationships between localities in the projection and ...
arxiv +1 more source