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Paper Abstract and Keywords
Presentation 2010-05-21 16:10
A semi-automatic extraction of the contour of the articular cartilage from MR images of the knee
Hiroki Sato, Toyohiko Hayashi, Go Omori, Satoshi Watanabe, Keisuke Sasagawa, Yoshinobu Maeda, Tetsuya Watanabe (Niigata Univ.) MBE2010-8
Abstract (in Japanese) (See Japanese page) 
(in English) Knee motion analysis has many clinical applications such as diagnosis of knee diseases and evaluation of postoperative knee functions. For analyzing knee motion in three-dimensions, a 3-D model based approaches were introduced recently by combining a fluoroscopic image-sequence of knee motion and a 3-D model of related knee bones. In order to expand such analysis into that including the articular cartilage, we need a 3-D model of the cartilage as well as bones. Then this paper proposed a semi-automatic extraction of cartilage contour in MR images. This extraction method has an advantage that a contour of the cartilage partly unclear in MR image can be estimated iteratively by using a function of evaluating the overall difference between present contour and that estimated from its neighboring gray distribution, from an initial contour roughly digitized manually. To evaluate its validity, we carried out several experiments using two different MR images of the knee. All empirical results suggested that our method would have a potential of easily extracting an accurate contour of the cartilage with high reproducibility.
Keyword (in Japanese) (See Japanese page) 
(in English) MR images / articular cartilage contour / knee motion analysis / / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 52, MBE2010-8, pp. 41-46, May 2010.
Paper # MBE2010-8 
Date of Issue 2010-05-14 (MBE) 
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 MBE  
Conference Date 2010-05-21 - 2010-05-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Toyama Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ME in general 
Paper Information
Registration To MBE 
Conference Code 2010-05-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A semi-automatic extraction of the contour of the articular cartilage from MR images of the knee 
Sub Title (in English)  
Keyword(1) MR images  
Keyword(2) articular cartilage contour  
Keyword(3) knee motion analysis  
1st Author's Name Hiroki Sato  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Toyohiko Hayashi  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Go Omori  
3rd Author's Affiliation Niigata University (Niigata Univ.)
4th Author's Name Satoshi Watanabe  
4th Author's Affiliation Niigata University (Niigata Univ.)
5th Author's Name Keisuke Sasagawa  
5th Author's Affiliation Niigata University (Niigata Univ.)
6th Author's Name Yoshinobu Maeda  
6th Author's Affiliation Niigata University (Niigata Univ.)
7th Author's Name Tetsuya Watanabe  
7th Author's Affiliation Niigata University (Niigata Univ.)
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Speaker Author-1 
Date Time 2010-05-21 16:10:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # MBE2010-8 
Volume (vol) vol.110 
Number (no) no.52 
Page pp.41-46 
Date of Issue 2010-05-14 (MBE) 

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