Analysis of resolution of tomographic-type reconstruction from discrete data for a class of distributions
Analysis of resolution of tomographic-type reconstruction from discrete data for a class of distributions
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一类分布的离散数据断层扫描型重建的分辨率分析
DOI:
10.1088/1361-6420/abb2fb
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发表时间:
2020
期刊:
影响因子:
2.1
通讯作者:
Katsevich, Alexander
中科院分区:
文献类型:
--
作者:
Katsevich, Alexander
Let,, be a piecewise smooth function with a jump discontinuity across a smooth surface. Letdenote the Lambda tomography (LT) reconstruction offrom its discrete Radon data. The sampling rate along each variable is. First, we compute the limitfor a generic. Once the limiting functionis known (which we call the discrete transition behavior, or DTB for short), the resolution of reconstruction can be easily found. Next, we show that straight segments oflead to non-local artifacts in, and that these artifacts are of the same strength as the useful singularities of. We also show thatdoes not converge to its continuous analogueaseven if. Results of numerical experiments presented in the paper confirm these conclusions. We also consider a class of Fourier integral operatorswith the same canonical relation as the classical Radon transform adjoint, and a class of distributions,, and obtain easy to use formulas for the DTB whenis computed from discrete data. Exact and LT reconstructions are particlular cases of this more general theory.
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DOI:
10.1137/17m1112108
发表时间:
2017
期刊:
SIAM J. Appl. Math.
影响因子:
--
作者:
A. Katsevich
通讯作者:
A. Katsevich
DOI:
10.1007/978-0-8176-8212-5_9
发表时间:
2004
期刊:
SIAM J. Appl. Math.
影响因子:
--
作者:
A. Faridani
通讯作者:
A. Faridani
DOI:
10.1137/19m1251837
发表时间:
2019
期刊:
SIAM J. Appl. Math.
影响因子:
--
作者:
A. Katsevich
通讯作者:
A. Katsevich
DOI:
10.1136/ebmh.11.4.102
发表时间:
2008-10
期刊:
Evidence Based Mental Health
影响因子:
--
作者:
P. Cochat;L. Vaucoret;J. Sarles
通讯作者:
P. Cochat;L. Vaucoret;J. Sarles
DOI:
--
发表时间:
1956
期刊:
影响因子:
--
作者:
F. Oberhettinger
通讯作者:
F. Oberhettinger