A Semi-Discrete Landweber–Kaczmarz Method for Cone Beam Tomography and Laminography Exploiting Geometric Prior Information
A Semi-Discrete Landweber–Kaczmarz Method for Cone Beam Tomography and Laminography Exploiting Geometric Prior Information
复制标题
利用几何先验信息进行锥形束层析成像和层析成像的半离散 LandweberâKaczmarz 方法
DOI:
10.1007/s11220-016-0142-7
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发表时间:
2016
影响因子:
2.2
通讯作者:
Schorr
中科院分区:
文献类型:
--
作者:
Vogelgesang;Schorr
We present a semi-discrete Landweber–Kaczmarz method for solving linear ill-posed problems and its application to Cone Beam tomography and laminography. Using a basis function-type discretization in the image domain, we derive a semi-discrete model of the underlying scanning system. Based on this model, the proposed method provides an approximate solution of the reconstruction problem, ie reconstructing the density function of a given object from its projections, in suitable subspaces equipped with basis function-dependent weights. This approach intuitively allows the incorporation of additional information about the inspected object leading to a more accurate model of the X-rays through the object. Also, physical conditions of the scanning geometry, like flat detectors in computerized tomography as used in non-destructive testing applications as well as non-regular scanning curves eg appearing in computed laminography (CL) applications, are directly taken into account during the modeling process. Finally, numerical experiments of a typical CL application in three dimensions are provided to verify the proposed method. The introduction of geometric prior information leads to a significantly increased image quality and superior reconstructions compared to standard iterative methods.
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影响因子:
2.1
作者:
A. Louis
通讯作者:
A. Louis
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
Robert S. Pienta;R. Fujimoto
通讯作者:
R. Fujimoto
影响因子:
2.2
作者:
G. Herman
通讯作者:
G. Herman
DOI:
10.1364/josaa.7.001834
发表时间:
1990-10-01
影响因子:
1.9
作者:
LEWITT, RM
通讯作者:
LEWITT, RM