K-edge Coded Apertures for Compressive Spectral X-ray Tomography
K-edge Coded Apertures for Compressive Spectral X-ray Tomography
复制标题
用于压缩能谱 X 射线断层扫描的 K 边缘编码孔径
DOI:
10.1109/icassp.2019.8682905
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Arce, Gonzalo R.
中科院分区:
文献类型:
--
作者:
Cuadros, Angela P.;Ma, Xu;Arce, Gonzalo R.
Spectral computed tomography (SCT) is used to perform material characterization in 3D images, a feature that is not possible with conventional computed tomography (CT) systems. Currently, photon-counting detectors are used to obtain the energy binned images in SCT, however, these detectors are costly and the measured data have low signal to noise ratios. This paper presents a new approach for SCT which circumvents the limitations of current SCT systems. It combines conventional X-ray imaging systems with K-edge coded aperture masks. In this scheme, a particular filter pair is aligned with each X-ray beam in a multi-shot architecture, therefore obtaining compressive measurements in both the spectral and spatial domains. Then, the energy binned images are reconstructed using the alternating direction method of multipliers (ADMM) to solve a joint sparse and low-rank optimization problem that exploits the structure of the spectral data-cube. Simulations using coded fan-beam X-ray projections demonstrate the feasibility of the proposed approach.
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DOI:
--
发表时间:
2013
期刊:
Image and Vision Computing New Zealand
影响因子:
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作者:
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