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2023
An improved iterative reconstruction method to reconstruct a first image includes generating an imaging beam, receiving said imaging beam on a detector array, generating projection data based on said imaging beams received by said detector array, providing said projection data to an image reconstructor, enlarging one of a plurality of voxels and a ...
De Man, Bruno Kristiaan Bernard +6 more
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An improved iterative reconstruction method to reconstruct a first image includes generating an imaging beam, receiving said imaging beam on a detector array, generating projection data based on said imaging beams received by said detector array, providing said projection data to an image reconstructor, enlarging one of a plurality of voxels and a ...
De Man, Bruno Kristiaan Bernard +6 more
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Iterative reconstruction algorithms
Computers in Biology and Medicine, 1976Abstract In this paper a survey of recent results on iterative reconstruction algorithms is given. These results, many of which have not yet appeared elsewhere, are applicable to a very general formulation of the reconstruction problem based on the series expansion approach.
Arnold Lent +3 more
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Adaptive iterative reconstruction
SPIE Proceedings, 2011It is well known that, in CT reconstruction, Maximum A Posteriori (MAP) reconstruction based on a Poisson noise model can be well approximated by Penalized Weighted Least Square (PWLS) minimization based on a data dependent Gaussian noise model. We study minimization of the PWLS objective function using the Gradient Descent (GD) method, and show that ...
Karl Stierstorfer +5 more
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Iterative reconstruction in cardiac CT
Journal of Cardiovascular Computed Tomography, 2015Iterative reconstruction (IR) has the ability to reduce image noise in CT without compromising diagnostic quality, which permits a significant reduction in effective radiation dose. This been increasingly integrated into clinical CT practice over the past 7 years and has been particularly important in the field of cardiac CT with multiple vendors ...
Jonathon Leipsic +2 more
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Iterative reconstruction algorithms in compressed sensing
2011 19thTelecommunications Forum (TELFOR) Proceedings of Papers, 2011In this paper we give an overview of current results in iterative reconstruction of sparse signals using parity check matrices of low-density parity check (LDPC) codes as measurement matrices in compressed sensing. We provide a detailed explanation of two iterative reconstruction algorithms, Interval Passing (IP) algorithm and verification algorithm ...
Danjean, Ludovic +3 more
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Integrated Procedure for Halo Current Reconstruction in ITER
IEEE Transactions on Plasma Science, 2011This paper describes an integrated procedure for the reconstruction of halo currents expected in ITER. The procedure is based on simulation and reconstruction codes, partially adapted from existing codes and partly developed specifically for this purpose.
S. Peruzzo +8 more
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European Radiology, 2014
The purpose of this study was to compare cranial CT (CCT) image quality (IQ) of the MBIR algorithm with standard iterative reconstruction (ASiR).In this institutional review board (IRB)-approved study, raw data sets of 100 unenhanced CCT examinations (120 kV, 50-260 mAs, 20 mm collimation, 0.984 pitch) were reconstructed with both ASiR and MBIR. Signal-
Susan Notohamiprodjo +6 more
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The purpose of this study was to compare cranial CT (CCT) image quality (IQ) of the MBIR algorithm with standard iterative reconstruction (ASiR).In this institutional review board (IRB)-approved study, raw data sets of 100 unenhanced CCT examinations (120 kV, 50-260 mAs, 20 mm collimation, 0.984 pitch) were reconstructed with both ASiR and MBIR. Signal-
Susan Notohamiprodjo +6 more
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Multi-scale iterative reconstruction
2011 IEEE Nuclear Science Symposium Conference Record, 2011Zoomed ROI reconstruction is a natural challenge for iterative reconstruction (IR), since the reprojection step requires knowledge of the entire object attenuating the x-ray beam. In contrast, analytic FBP can reconstruct images within the zoomed ROI without the need of the full FOV reconstruction, provided projection data is not truncated. To overcome
Mihail Petru Dinu +2 more
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A new iterative reconstruction scheme for signal reconstruction
APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems, 2008Projection Onto Convex Sets (POCS) is an iterative method to obtain the information from one domain using the information available in other domains, and it has been widely used in image restoration problems and block-based DCT compression standards as a post-processing scheme.
Anamitra Makur, Honglin Huang
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Iterative reconstruction algorithms in nuclear medicine
Computerized Medical Imaging and Graphics, 2001Iterative reconstruction algorithms produce accurate images without streak artifacts as in filtered backprojection. They allow improved incorporation of important corrections for image degrading effects, such as attenuation, scatter and depth-dependent resolution.
K. Van Laere +8 more
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