Shearlet-based regularized reconstruction in region-of-interest computed tomography
Shearlet-based regularized reconstruction in region-of-interest computed tomography
复制标题
感兴趣区域计算机断层扫描中基于剪切波的正则化重建
DOI:
10.1051/mmnp/2018014
复制
发表时间:
2018
影响因子:
2.2
通讯作者:
Bonettini, S
中科院分区:
文献类型:
--
作者:
Bubba, T;Labate, D;Zanghirati, G;Bonettini, S
Region of interest (ROI) tomography has gained increasing attention in recent years due to its potential to reducing radiation exposure and shortening the scanning time. However, tomographic reconstruction from ROI-focused illumination involves truncated projection data and typically results in higher numerical instability even when the reconstruction problem has unique solution. To address this problem, bothad hocanalytic formulas and iterative numerical schemes have been proposed in the literature. In this paper, we introduce a novel approach for ROI tomographic reconstruction, formulated as a convex optimization problem with a regularized term based on shearlets. Our numerical implementation consists of an iterative scheme based on the scaled gradient projection method and it is tested in the context of fan-beam CT. Our results show that our approach is essentially insensitive to the location of the ROI and remains very stable also when the ROI size is rather small.
登录
查看更多内容
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
R. Clackdoyle;M. Defrise
通讯作者:
M. Defrise
DOI:
--
发表时间:
2010
期刊:
Medical Physics (Lancaster)
影响因子:
--
作者:
B. Hamelin;Y. Goussard;J. Dussault;G. Cloutier;G. Beaudoin;G. Soulez
通讯作者:
G. Soulez
影响因子:
2.1
作者:
Clackdoyle, R;Noo, F
通讯作者:
Noo, F
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
T. Bubba;Federica Porta;G. Zanghirati;S. Bonettini
通讯作者:
S. Bonettini
影响因子:
1.3
作者:
R. Azencott;B. Bodmann;Tasadduk Chowdhury;D. Labate;Anando Sen;Daniel Vera
通讯作者:
Daniel Vera