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Paper Abstract and Keywords
Presentation 2007-08-10 15:20
Ultrasonic measurement of displacement distribution inside object cyclically compressed by acoustic radiation forces
Yoshitaka Odagiri, Hideyuki Hasegawa, Hiroshi Kanai (Tohoku Univ.) EA2007-53
Abstract (in Japanese) (See Japanese page) 
(in English) A possible way for the quantitative evaluation of the acupuncture therapy is the measurement of the change in the elastic property of muscle due to application of the acupuncture therapy. Many studies have been conducted to measure mechanical properties of tissues by applying an ultrasound-induced acoustic radiation force. To assess mechanical properties, strain of an object must be generated. However, one radiation force is not effective because it also generates translational motion when the object is much harder than surrounding medium. In this study, two cyclic radiation forces are applied to a muscle phantom from two opposite horizontal directions so that the object is cyclically compressed in the horizontal direction. By the horizontal compression, the object is vertically expanded due to its incompressibility. The resultant vertical displacement is measured using ultrasound. Two ultrasonic transducers for actuation were both driven by sums of two continuous sinusoidal signals at two slightly different frequencies (1 MHz and (1 M+5) Hz). In this paper, two cyclic acoustic radiation forces were applied to the object to generate strain inside it and the displacement inside the object was measured by ultrasound.
Keyword (in Japanese) (See Japanese page) 
(in English) ultrasound / acoustic radiation force / strain / phased tracking method / acupuncture therapy / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 187, EA2007-53, pp. 43-46, Aug. 2007.
Paper # EA2007-53 
Date of Issue 2007-08-03 (EA) 
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)
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Conference Information
Committee EA  
Conference Date 2007-08-09 - 2007-08-10 
Place (in Japanese) (See Japanese page) 
Place (in English) School of Engineering, Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Hearing, Audio Signal Processing, etc. 
Paper Information
Registration To EA 
Conference Code 2007-08-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Ultrasonic measurement of displacement distribution inside object cyclically compressed by acoustic radiation forces 
Sub Title (in English)  
Keyword(1) ultrasound  
Keyword(2) acoustic radiation force  
Keyword(3) strain  
Keyword(4) phased tracking method  
Keyword(5) acupuncture therapy  
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1st Author's Name Yoshitaka Odagiri  
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 2007-08-10 15:20:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2007-53 
Volume (vol) vol.107 
Number (no) no.187 
Page pp.43-46 
#Pages 4 
Date of Issue 2007-08-03 (EA) 

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