Journal ArticleDOI
A Multiresolution Approach to Iterative Reconstruction Algorithms in X-Ray Computed Tomography
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TLDR
It is shown that, combined with an efficient implementation on a graphical processing unit, the multiresolution approach enables the application of iterative algorithms in the reconstruction of large volumes at an acceptable speed using only limited resources.Abstract:
In computed tomography, the application of iterative reconstruction methods in practical situations is impeded by their high computational demands. Especially in high resolution X-ray computed tomography, where reconstruction volumes contain a high number of volume elements (several giga voxels), this computational burden prevents their actual breakthrough. Besides the large amount of calculations, iterative algorithms require the entire volume to be kept in memory during reconstruction, which quickly becomes cumbersome for large data sets. To overcome this obstacle, we present a novel multiresolution reconstruction, which greatly reduces the required amount of memory without significantly affecting the reconstructed image quality. It is shown that, combined with an efficient implementation on a graphical processing unit, the multiresolution approach enables the application of iterative algorithms in the reconstruction of large volumes at an acceptable speed using only limited resources.read more
Citations
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Journal ArticleDOI
X-ray computed tomography of planetary materials: A primer and review of recent studies
Romy D. Hanna,Richard A. Ketcham +1 more
TL;DR: X-ray computed tomography (XCT) is a powerful 3D imaging technique that has been used to investigate meteorites, mission-returned samples, and other planetary materials of all scales from dust particles to large rocks.
Journal ArticleDOI
A novel beam hardening correction method requiring no prior knowledge, incorporated in an iterative reconstruction algorithm
TL;DR: In this article, the beam hardening is modeled and incorporated in the forward projector of the simultaneous algebraic reconstruction technique (SART), which can be used in case no information about the beam spectrum or the material properties is available.
Journal ArticleDOI
Efficient Volume Reconstruction for Parallel-Beam Computed Laminography by Filtered Backprojection on Multi-Core Clusters
TL;DR: From the Fourier slice theorem, a framework for analytic image reconstruction and outline implementation details of the generic FBP algorithm are derived and different approaches reducing the reconstruction time by means of parallel and distributed computations are considered and evaluated.
Journal ArticleDOI
Recent Advances in X-ray Cone-beam Computed Laminography
TL;DR: The advances made in the last several years are examined, including the introduction of novel system trajectories, the application and refinement of various reconstruction methods, and the use of recently developed computational hardware and software techniques to accelerate reconstruction times.
Journal ArticleDOI
X-ray sub-micron tomography as a tool for the study of archaeological wood preserved through the corrosion of metal objects
Kristof Haneca,Koen Deforce,Matthieu Boone,D. Van Loo,Manuel Dierick,J. Van Acker,J. Van den Bulcke +6 more
TL;DR: In this article, a state-of-the-art multi-resolution X-ray tomography set-up (http://www.ugct.ugent.be) provided virtual cross-sections of the archaeological wood samples at sub-micron resolution.
References
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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.
Journal Article
Practical cone-beam algorithm
TL;DR: In this article, a convolution-backprojection formula is deduced for direct reconstruction of a three-dimensional density function from a set of two-dimensional projections, which has useful properties, including errors that are relatively small in many practical instances and a form that leads to convenient computation.
Journal ArticleDOI
Practical cone-beam algorithm
TL;DR: In this article, a convolution-backprojection formula is deduced for direct reconstruction of a three-dimensional density function from a set of two-dimensional projections, which has useful properties, including errors that are relatively small in many practical instances and a form that leads to convenient computation.
Journal ArticleDOI
Accelerated image reconstruction using ordered subsets of projection data
H.M. Hudson,R.S. Larkin +1 more
TL;DR: Ordered subsets EM (OS-EM) provides a restoration imposing a natural positivity condition and with close links to the EM algorithm, applicable in both single photon (SPECT) and positron emission tomography (PET).
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The Mathematics of Computerized Tomography
TL;DR: In this paper, the Radon transform and related transforms have been studied for stability, sampling, resolution, and accuracy, and quite a bit of attention is given to the derivation, analysis, and practical examination of reconstruction algorithm, for both standard problems and problems with incomplete data.