Low-Dose Dual KVP Switching Using A Static Coded Aperture
Low-Dose Dual KVP Switching Using A Static Coded Aperture
复制标题
DOI：
10.1109/isbi48211.2021.9434080
复制
发表时间：
2021-04
期刊：
影响因子：
--
通讯作者：
Angela P. Cuadros;Carlos M. Restrepo;P. Noel
中科院分区：
文献类型：
--
作者：
Angela P. Cuadros;Carlos M. Restrepo;P. Noel
本文介绍了一种单扫描双能量编码孔径计算机断层扫描系统，使材料表征在降低曝光水平。具有单静态块/非块编码孔径的快速kVp切换依赖于具有由kVp切换创建的多个X射线光谱的编码照明。基于投影数据的张量表示，提出了一种估计张量中缺失测量值的算法。这产生了一组完整的合成测量值，可以与滤波反投影或迭代重建算法一起使用，以准确地重建每个能量通道中的对象。仿真结果验证了所提出的具有成本效益的解决方案的有效性，以实现低剂量双能CT的材料表征。
This paper introduces a single-scan dual-energy coded aperture computed tomography system that enables material characterization at a reduced exposure level. Rapid kVp switching with a single-static block/unblock coded aperture relies on coded illumination with a plurality of X-ray spectra created by the kVp switching. Based on the tensor representation of the projection data, an algorithm to estimate the missing measurements in the tensor is proposed. This results in a full set of synthesized measurements that can be used with filtered back-projection or iterative reconstruction algorithms to accurately reconstruct the object in each energy channel. Simulation results validate the effectiveness of the proposed cost-effective solution to attain material characterization in low-dose dual-energy CT.