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Paper Abstract and Keywords
Presentation 2019-11-05 16:10
[Short Paper] Proposal of fault-tolerant CT image reconstruction using Nonlocal Total Variation and its application to metal artifact reduction
Kazuki Chigita (Univ. Tsukuba), Jian Dong (TUTE), Yongchae Kim, Hiroyuki Kudo (Univ. Tsukuba) MICT2019-37 MI2019-64
Abstract (in Japanese) (See Japanese page) 
(in English) When some abnormal data is included in the projection data, the normal image reconstruction method increases the influence of the abnormal data on the whole image and generates strong artifacts. We have proposed a fault-tolerant CT reconstruction method that automatically estimates and removes the location of abnormal data in the projection data and reconstructs the image. In this method, $L^1$ norm was used for the data term and Total Variation (TV) was used for the regularization term. However, there have been problems such as the tendency of Staircase artifacts to occur in images due to the use of TV as a regularization term, and the loss of smooth density conversion. In this study, we propose a new fault-tolerant image reconstruction method that improves the image quality performance by using Nonlocal TV. In this study, we perform simulation experiments assuming removal of metal artifacts and show the effectiveness of the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) CT image reconstruction / Metal artifact reduction / Nonlocal TV / fault-tolerant CT reconstruction / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 264, MI2019-64, pp. 55-56, Nov. 2019.
Paper # MI2019-64 
Date of Issue 2019-10-29 (MICT, MI) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee MI MICT  
Conference Date 2019-11-05 - 2019-11-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. of Tsukuba 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical imaging technology, healthcare and medical information communication technology 
Paper Information
Registration To MI 
Conference Code 2019-11-MI-MICT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Proposal of fault-tolerant CT image reconstruction using Nonlocal Total Variation and its application to metal artifact reduction 
Sub Title (in English)  
Keyword(1) CT image reconstruction  
Keyword(2) Metal artifact reduction  
Keyword(3) Nonlocal TV  
Keyword(4) fault-tolerant CT reconstruction  
1st Author's Name Kazuki Chigita  
1st Author's Affiliation University of Tsukuba (Univ. Tsukuba)
2nd Author's Name Jian Dong  
2nd Author's Affiliation Tianjin University of Technology and Education (TUTE)
3rd Author's Name Yongchae Kim  
3rd Author's Affiliation University of Tsukuba (Univ. Tsukuba)
4th Author's Name Hiroyuki Kudo  
4th Author's Affiliation University of Tsukuba (Univ. Tsukuba)
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Date Time 2019-11-05 16:10:00 
Presentation Time 20 
Registration for MI 
Paper # IEICE-MICT2019-37,IEICE-MI2019-64 
Volume (vol) IEICE-119 
Number (no) no.263(MICT), no.264(MI) 
Page pp.55-56 
#Pages IEICE-2 
Date of Issue IEICE-MICT-2019-10-29,IEICE-MI-2019-10-29 

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