Results 321 to 330 of about 1,826,590 (358)

Deep iterative reconstruction estimation (DIRE): approximate iterative reconstruction estimation for low dose CT imaging

Physics in Medicine and Biology, 2019
The image quality in low dose computed tomography (LDCT) can be severely degraded by amplified mottle noise and streak artifacts. Although the iterative reconstruction (IR) algorithms bring sound improvements, their high computation cost remains a major ...
Jin Liu, Yi Zhang, Qianlong Zhao, T. Lv, Weiwen Wu, Ning Cai, Guotao Quan, Wei Yang, Yang Chen, L. Luo, H. Shu, J. Coatrieux   +11 more
semanticscholar   +1 more source

Iterative reconstruction algorithms in compressed sensing

2011 19thTelecommunications Forum (TELFOR) Proceedings of Papers, 2011
In 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, Ravanmehr, Vida, Declercq, David, Vasic, Bane   +3 more
openaire   +3 more sources

Integrated Procedure for Halo Current Reconstruction in ITER

IEEE Transactions on Plasma Science, 2011
This 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, ALBANESE, Raffaele, P. Bettini, M. Caputano, N. Marconato, M. Mattei, RUBINACCI, GUGLIELMO, A. Soppelsa, F. Villone   +8 more
openaire   +10 more sources

Optimizing a Parameterized Plug-and-Play ADMM for Iterative Low-Dose CT Reconstruction

IEEE Transactions on Medical Imaging, 2019
Reducing the exposure to X-ray radiation while maintaining a clinically acceptable image quality is desirable in various CT applications. To realize low-dose CT (LdCT) imaging, model-based iterative reconstruction (MBIR) algorithms are widely adopted ...
Ji He, Yan Yang, Yongbo Wang, D. Zeng, Z. Bian, Hao Zhang, Jian Sun, Zongben Xu, Jianhua Ma   +8 more
semanticscholar   +1 more source

Image quality of iterative reconstruction in cranial CT imaging: comparison of model-based iterative reconstruction (MBIR) and adaptive statistical iterative reconstruction (ASiR)

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, F. Meurer, F. Maertz, Z. Deak, Stefan Wirth, Lucas L. Geyer, Fabian G Mueck   +6 more
openaire   +2 more sources

Multi-scale iterative reconstruction

2011 IEEE Nuclear Science Symposium Conference Record, 2011
Zoomed 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, Daxin Shi, Alexander A. Zamyatin   +2 more
openaire   +2 more sources

A new iterative reconstruction scheme for signal reconstruction

APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems, 2008
Projection 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
openaire   +2 more sources

Iterative reconstruction algorithms in nuclear medicine

Computerized Medical Imaging and Graphics, 2001
Iterative 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, Yves D'Asseler, Tomi Kauppinen, R. Van de Walle, Rudi Dierckx, Stefaan Vandenberghe, Michel Koole, L. Bouwens, Ignace Lemahieu   +8 more
openaire   +2 more sources

An optimal rotator for iterative reconstruction

IEEE Transactions on Medical Imaging, 1997
For implementations of iterative reconstruction algorithms that rotate the image matrix, the characteristics of the rotator may affect the reconstruction quality. Desirable qualities for the rotator include: (1) preservation of global and local image counts; (2) accurate count positioning; (3) a uniform and predictable amount of blurring due to the ...
Jerold W. Wallis, Tom R. Miller
openaire   +2 more sources

Iterative reconstruction of low-dose CT based on differential sparse

Biomedical Signal Processing and Control, 2023
Siyu Lu, Bo Yang, Ye Xiao, Shan Liu, Mingzhe Liu, Lirong Yin, Wenfeng Zheng   +6 more
semanticscholar   +1 more source