4 DCT Reconstrucion Using Sparsity Level Constrained Compressed Sensing
4 DCT Reconstrucion Using Sparsity Level Constrained Compressed Sensing
复制标题
4 使用稀疏水平约束压缩感知的 DCT 重建
DOI:
--
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
J. Hornegger
中科院分区:
文献类型:
--
作者:
Haibo Wu;A. Maier;H. Hofmann;R. Fahrig;J. Hornegger
4D-CT is an important tool for treatment simulation and treatment planning in radiotherapy. In order to capture the tumor and tissue movement over time, 4D-CT has to acquire more projection images compared to 3D-CT. This leads to more radiation dose, which is the main concern of the application. Using fewer projections can reduce the radiation dose. However, lack of projections degrades the reconstructed image quality for traditional methods. In this paper, we propose a novel method based on iterative hard thresholding and compressed sensing. We combine the prior knowledge from both methods in our reconstruction problem formulation. In the experiments, we validate our method with XCAT phantom data. The Euclidean norm of the reconstructed images and the ground truth are calculated for evaluation. The results show that our method outperforms the traditional reconstruction method.
DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
Hao Gao;Jian-Feng Cai;Zuowei Shen;Hongkai Zhao
通讯作者:
Hao Gao;Jian-Feng Cai;Zuowei Shen;Hongkai Zhao
影响因子:
3.8
作者:
Ford, EC;Mageras, GS;Ling, CC
通讯作者:
Ling, CC