PMID- 27490315
OWN - NLM
STAT- MEDLINE
DCOM- 20171220
LR  - 20181202
IS  - 1879-0771 (Electronic)
IS  - 0895-6111 (Linking)
VI  - 53
DP  - 2016 Oct
TI  - Penalized weighted least-squares approach for multienergy computed tomography 
      image reconstruction via structure tensor total variation regularization.
PG  - 19-29
LID - S0895-6111(16)30067-2 [pii]
LID - 10.1016/j.compmedimag.2016.07.002 [doi]
AB  - Multienergy computed tomography (MECT) allows identifying and differentiating 
      different materials through simultaneous capture of multiple sets of 
      energy-selective data belonging to specific energy windows. However, because 
      sufficient photon counts are not available in each energy window compared with 
      that in the whole energy window, the MECT images reconstructed by the analytical 
      approach often suffer from poor signal-to-noise and strong streak artifacts. To 
      address the particular challenge, this work presents a penalized weighted 
      least-squares (PWLS) scheme by incorporating the new concept of structure tensor 
      total variation (STV) regularization, which is henceforth referred to as 
      'PWLS-STV' for simplicity. Specifically, the STV regularization is derived by 
      penalizing higher-order derivatives of the desired MECT images. Thus it could 
      provide more robust measures of image variation, which can eliminate the patchy 
      artifacts often observed in total variation (TV) regularization. Subsequently, an 
      alternating optimization algorithm was adopted to minimize the objective 
      function. Extensive experiments with a digital XCAT phantom and meat specimen 
      clearly demonstrate that the present PWLS-STV algorithm can achieve more gains 
      than the existing TV-based algorithms and the conventional filtered 
      backpeojection (FBP) algorithm in terms of both quantitative and visual quality 
      evaluations.
CI  - Copyright (c) 2016 Elsevier Ltd. All rights reserved.
FAU - Zeng, Dong
AU  - Zeng D
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China.
FAU - Gao, Yuanyuan
AU  - Gao Y
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China.
FAU - Huang, Jing
AU  - Huang J
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China.
FAU - Bian, Zhaoying
AU  - Bian Z
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China.
FAU - Zhang, Hua
AU  - Zhang H
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China.
FAU - Lu, Lijun
AU  - Lu L
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China.
FAU - Ma, Jianhua
AU  - Ma J
AD  - Department of Biomedical Engineering, Southern Medical University, Guangzhou, 
      Guangdong 510515, China; Guangdong Provincial Key Laboratory of Medical Image 
      Processing, Southern Medical University, Guangzhou, Guangdong 510515, China. 
      Electronic address: jhma@smu.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20160719
PL  - United States
TA  - Comput Med Imaging Graph
JT  - Computerized medical imaging and graphics : the official journal of the 
      Computerized Medical Imaging Society
JID - 8806104
SB  - IM
MH  - Algorithms
MH  - *Image Processing, Computer-Assisted
MH  - Least-Squares Analysis
MH  - *Tomography, X-Ray Computed
OTO - NOTNLM
OT  - Multienergy computed tomography
OT  - Penalized weighted least-squares
OT  - Regularization
OT  - Structure tensor total variation
EDAT- 2016/08/05 06:00
MHDA- 2017/12/21 06:00
CRDT- 2016/08/05 06:00
PHST- 2015/12/11 00:00 [received]
PHST- 2016/06/13 00:00 [revised]
PHST- 2016/07/14 00:00 [accepted]
PHST- 2016/08/05 06:00 [entrez]
PHST- 2016/08/05 06:00 [pubmed]
PHST- 2017/12/21 06:00 [medline]
AID - S0895-6111(16)30067-2 [pii]
AID - 10.1016/j.compmedimag.2016.07.002 [doi]
PST - ppublish
SO  - Comput Med Imaging Graph. 2016 Oct;53:19-29. doi: 
      10.1016/j.compmedimag.2016.07.002. Epub 2016 Jul 19.