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 |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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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MICT2019-37 MI2019-64 |
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) |
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Keyword(1) |
CT image reconstruction |
Keyword(2) |
Metal artifact reduction |
Keyword(3) |
Nonlocal TV |
Keyword(4) |
fault-tolerant CT reconstruction |
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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 |
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University of Tsukuba (Univ. Tsukuba) |
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Speaker |
Author-1 |
Date Time |
2019-11-05 16:10:00 |
Presentation Time |
20 minutes |
Registration for |
MI |
Paper # |
MICT2019-37, MI2019-64 |
Volume (vol) |
vol.119 |
Number (no) |
no.263(MICT), no.264(MI) |
Page |
pp.55-56 |
#Pages |
2 |
Date of Issue |
2019-10-29 (MICT, MI) |
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