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Paper Abstract and Keywords
Presentation 2019-05-19 09:50
Quantitative evaluation of the femoral condylar shape in the knee joint with the discoid meniscus
Takeru Hirano, Toyohiko Hayashi (Niigata Univ), Satoshi Watanabe (Niigata Medical Center) MBE2019-3
Abstract (in Japanese) (See Japanese page) 
(in English) In order to reduce the load working on the knee joint, two meniscuses are placed as soft tissue on the lateral and medial sides of the tibial joint surface. Normal meniscus has a crescent shape, but lateral meniscus rarely becomes discoid. Although the femoral condylar surface is reported to be flattened in the knees with discoid meniscus, such phenomenon has yet to be evaluated quantitatively. Then this study quantified the flatness of the femoral condylar surface in the following manner: 1) the contour of the subchondral bone was extracted in the midsagittal MR images of the lateral femoral condyle; 2) the position on the contour was normalized as 0 % - 100 % from the point contact with the most anterior point of the meniscus to the most proximal point, respectively; and 3) the radius of curvature was computed at every position (%) on the contour. Then the radius of curvature was compared between the knees with discoid meniscus (4 cases) and those with normal meniscus (8 cases). Consequently, the former knees were flattened significantly from 31 % to 41 % of the contour than the latter knees.
Keyword (in Japanese) (See Japanese page) 
(in English) Meniscus / Discoid meniscus / Femoral condyle / MR image / Radius of curvature / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 44, MBE2019-3, pp. 13-18, May 2019.
Paper # MBE2019-3 
Date of Issue 2019-05-12 (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 2019-05-19 - 2019-05-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Niigata University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2019-05-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Quantitative evaluation of the femoral condylar shape in the knee joint with the discoid meniscus 
Sub Title (in English)  
Keyword(1) Meniscus  
Keyword(2) Discoid meniscus  
Keyword(3) Femoral condyle  
Keyword(4) MR image  
Keyword(5) Radius of curvature  
1st Author's Name Takeru Hirano  
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 Satoshi Watanabe  
3rd Author's Affiliation Niigata Medical Center (Niigata Medical Center)
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Date Time 2019-05-19 09:50:00 
Presentation Time 25 
Registration for MBE 
Paper # MBE2019-3 
Volume (vol) 119 
Number (no) no.44 
Page pp.13-18 
Date of Issue 2019-05-12 (MBE) 

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