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Paper Abstract and Keywords
Presentation 2007-07-11 11:00
CAD schme for detection of lacunar infarcts in brain MR images
Yoshikazu Uchiyama, Ryujiro Yokoyama, Takeshi Hara, Hiroshi Fujita, Takahiko Asano, Hiroki Kato, Hiroaki Hoshi, Toru Iwama (Gifu Univ.) MI2007-29
Abstract (in Japanese) (See Japanese page) 
(in English) The detection of asymptomatic lacunar infarcts on magnetic resonance (MR) images are important tasks for radiologists to ensure the prevention of sever cerebral infarctions. However, accurate identification of lacunar infarcts is difficult because it is hard to distinguish lacunar infarcts and enlarged Virchow-Robin spaces. Therefore, we developed a computer-aided diagnosis (CAD) scheme for detection of lacunar infarcts. The current performance level by computer is 96.8% in sensitivity with a number of false positives of 0.3 per image. As the next step in this study, we carried out an observer study to evaluate radiologists’ performance in detection of lacunar infarcts without and with use of the CAD scheme. Nine radiologists participated in the observer study. For all 9 observers, average area under the receiver operating characteristic curve value was increased from 0.886 to 0.930 when they use the computer output. In conclusion, our CAD scheme has the potential to improve the accuracy of radiologists’ performance in the detection of lacunar infarcts on MR images.
Keyword (in Japanese) (See Japanese page) 
(in English) Magnetic resonance imaging (MRI) / Lacunar infarct / Computer-aided diagnosis (CAD) / Receiver operating characteristic (ROC) analysis / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 133, MI2007-29, pp. 11-16, July 2007.
Paper # MI2007-29 
Date of Issue 2007-07-04 (MI) 
ISSN Print edition: ISSN 0913-5685    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)
Download PDF MI2007-29

Conference Information
Committee MI  
Conference Date 2007-07-11 - 2007-07-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Siemens Forum 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical Imaging 
Paper Information
Registration To MI 
Conference Code 2007-07-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) CAD schme for detection of lacunar infarcts in brain MR images 
Sub Title (in English)  
Keyword(1) Magnetic resonance imaging (MRI)  
Keyword(2) Lacunar infarct  
Keyword(3) Computer-aided diagnosis (CAD)  
Keyword(4) Receiver operating characteristic (ROC) analysis  
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Keyword(6)  
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1st Author's Name Yoshikazu Uchiyama  
1st Author's Affiliation Gifu University (Gifu Univ.)
2nd Author's Name Ryujiro Yokoyama  
2nd Author's Affiliation Gifu University (Gifu Univ.)
3rd Author's Name Takeshi Hara  
3rd Author's Affiliation Gifu University (Gifu Univ.)
4th Author's Name Hiroshi Fujita  
4th Author's Affiliation Gifu University (Gifu Univ.)
5th Author's Name Takahiko Asano  
5th Author's Affiliation Gifu University (Gifu Univ.)
6th Author's Name Hiroki Kato  
6th Author's Affiliation Gifu University (Gifu Univ.)
7th Author's Name Hiroaki Hoshi  
7th Author's Affiliation Gifu University (Gifu Univ.)
8th Author's Name Toru Iwama  
8th Author's Affiliation Gifu University (Gifu Univ.)
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Speaker Author-1 
Date Time 2007-07-11 11:00:00 
Presentation Time 30 minutes 
Registration for MI 
Paper # MI2007-29 
Volume (vol) vol.107 
Number (no) no.133 
Page pp.11-16 
#Pages 6 
Date of Issue 2007-07-04 (MI) 

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