[Oral Presentation]Plug-and-play Framelet Tensor Prior for Spectral Computed Tomography Reconstruction - Presentation details

Plug-and-play Framelet Tensor Prior for Spectral Computed Tomography Reconstruction
ID:69 Submission ID:44 View Protection:ATTENDEE Updated Time:2021-10-30 18:52:26 Hits:595 Oral Presentation

Start Time:2021-11-14 14:30 (Asia/Shanghai)

Duration:15min

Session:[PS1] Plenary Session 1 [CT1] Workshop on CT

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Abstract
Spectral computed tomography has developed greatly in recent years because of its potential in material identification. It is difficult to obtain ideal reconstruction results only based on measured data. In order to obtain high quality reconstructed images, it always need to exploit prior knowledge as regularization terms in reconstruction model. However, when the prior changes, the overall framework of the algorithm changes accordingly. In this paper, we establish a reconstruction model that composed of a data fidelity term and a regularization term of tensor prior. The latter is simplified into a subproblem via the alternating direction method of multipliers, which can be flexibly replaced and solved under the plug-and-play framework.  Then, framelet tensor nuclear norm is acted on the tensors formed by similar block matching extraction and plugged as the regularization into the iterative scheme to update algorithm. The performance of the proposed method was verified by an industrial QRM phantom. Experimental results show that the proposed method has advantages in preserving structural details, even if projection views decrease.
Keywords
spectral CT,plug-and-play,framelet,tensor nuclear norm,alternating direction method of multipliers
Speaker
Xiaohuan Yu
Information Engineering University

Submission Author
Xiaohuan Yu Information Engineering University
Xinyi Zhong Information Engineering University
Zhizhong Zheng Information Engineering University
Ailong Cai Information Engineering University
Lei Li Information Engineering University
Bin Yan Information Engineering University
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Important Dates

Abstract submission date:

2021-08-31

2021-10-25

Full paper submission date:

2021-09-15

2021-10-25

Notification of acceptance date: 

2021-09-30

2021-11-01

Conference date: 2021-11-12~2021-11-14

 

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