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Paper Abstract and Keywords
Presentation 2013-01-24 13:10
Improvement of 4D Cone-beam CT image quality via iterative reconstruction methhod
Satoshi Kida (Tokyo Univ.), Yoshitaka Masutani (Tokyo Univ Hospital), Masahiro Nakano (Tokyo Univ.), Toshikazu Imae, Akihiro Haga (Tokyo Univ Hospital) MI2012-76
Abstract (in Japanese) (See Japanese page) 
(in English) Cone-beam computed tomography (CBCT) is a major online imaging modality for image-guided radiotherapy (IGRT) and improvement of CBCT image quality can contribute to detect accurate localization of target and administrate treatment dose. However, image quality of CBCT is superior to Fan beam CT, and this image degradation limits the accuracy of localization of target and make dose calculation on the CBCT images difficult. Four-dimensional cone beam CT (4D-CBCT) is also well known as powerful modality for IGRT. Conventionally, it is reconstructed by sorting the X-ray projection images into each respiratory phase according to a breathing signal using the FDK algorithm. This usually leads to inadequate number of projections in each phase, resulting in low quality 4D-CBCT images with obvious streaking artifacts. We tried to improve the image quality for 4D CBCT using iterative reconstruction method (ML-convex) and compared with the images by FDK in SNR of the reconstructed images.
Keyword (in Japanese) (See Japanese page) 
(in English) 4D Cone-beam CT / iterative reconstruction / ML-convex / scatter correction / image quality / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 411, MI2012-76, pp. 73-75, Jan. 2013.
Paper # MI2012-76 
Date of Issue 2013-01-17 (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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MI2012-76

Conference Information
Committee MI  
Conference Date 2013-01-24 - 2013-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Bunka Tenbusu Kan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Computational anatomy and its application to computer assisted diagnosis and therapy, etc 
Paper Information
Registration To MI 
Conference Code 2013-01-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of 4D Cone-beam CT image quality via iterative reconstruction methhod 
Sub Title (in English)  
Keyword(1) 4D Cone-beam CT  
Keyword(2) iterative reconstruction  
Keyword(3) ML-convex  
Keyword(4) scatter correction  
Keyword(5) image quality  
1st Author's Name Satoshi Kida  
1st Author's Affiliation The University of Tokyo (Tokyo Univ.)
2nd Author's Name Yoshitaka Masutani  
2nd Author's Affiliation The University of Tokyo Hospital (Tokyo Univ Hospital)
3rd Author's Name Masahiro Nakano  
3rd Author's Affiliation The University of Tokyo (Tokyo Univ.)
4th Author's Name Toshikazu Imae  
4th Author's Affiliation The University of Tokyo Hospital (Tokyo Univ Hospital)
5th Author's Name Akihiro Haga  
5th Author's Affiliation The University of Tokyo Hospital (Tokyo Univ Hospital)
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Date Time 2013-01-24 13:10:00 
Presentation Time 20 
Registration for MI 
Paper # IEICE-MI2012-76 
Volume (vol) IEICE-112 
Number (no) no.411 
Page pp.73-75 
#Pages IEICE-3 
Date of Issue IEICE-MI-2013-01-17 

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