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Paper Abstract and Keywords
Presentation 2011-09-26 14:25
Investigation on Optimal Correlation Kernel Size for Ultrasonic Measurement of Heart Wall Motion at High Temporal Resolution
Yasunori Honjo, Hideyuki Hasegawa, Hiroshi Kanai (Tohoku Univ.) US2011-47
Abstract (in Japanese) (See Japanese page) 
(in English) For noninvasive and quantitative measurement of global two-dimensional (2-D) heart wall motion, speckle tracking methods have been developed. However, an important parameter, the optimal size of a correlation kernel, has not been thoroughly investigated. Moreover, the frame rate in these methods is limited to about 200 Hz, corresponding to the sampling period of heart wall motion of 5 ms. Under rapid motion of the heart, speckle tracking methods may fail to estimate the heart wall motion due to a low frame rate because it leads to significant changes in echo patterns during a frame interval. In our previous study, the optimal kernel size was determined in a phantom experiment and, then, the determined optimal kernel size was applied to the in vivo measurement of 2-D velocities of the heart wall by normalized cross-correlation between RF echoes. However, evaluation of measurement of the strain rate is not still sufficient. In the present study, the determined optimal kernel size was applied for estimating the strain rate and compared with other sizes and, then, the myocardial strain rate was measured so that the myocardial function could be measured at a high frame rate.
Keyword (in Japanese) (See Japanese page) 
(in English) correlation kernel / speckle tracking / high frame rate / in vivo experiment / strain rate / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 215, US2011-47, pp. 7-11, Sept. 2011.
Paper # US2011-47 
Date of Issue 2011-09-19 (US) 
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 US2011-47

Conference Information
Committee US  
Conference Date 2011-09-26 - 2011-09-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To US 
Conference Code 2011-09-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation on Optimal Correlation Kernel Size for Ultrasonic Measurement of Heart Wall Motion at High Temporal Resolution 
Sub Title (in English)  
Keyword(1) correlation kernel  
Keyword(2) speckle tracking  
Keyword(3) high frame rate  
Keyword(4) in vivo experiment  
Keyword(5) strain rate  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Yasunori Honjo  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Hideyuki Hasegawa  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Hiroshi Kanai  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2011-09-26 14:25:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2011-47 
Volume (vol) vol.111 
Number (no) no.215 
Page pp.7-11 
#Pages 5 
Date of Issue 2011-09-19 (US) 

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