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Paper Abstract and Keywords
Presentation 2017-07-27 14:50
Focus and Frequency Evaluation of Focused Ultrasonic Probe Using Concave Transducer
Yuusuke Tanaka, Junnichi Kitada, Yukio Ogura (Japan Probe) US2017-40
Abstract (in Japanese) (See Japanese page) 
(in English) The focal position of the focused ultrasonic probe using a concave transducer was investigated for the focal points of probes with different radius of curvature. The aperture angle was set as in the case of the acoustic lens type focused ultrasonic probe as the parameter at design time, and when the aperture angle was small, it was confirmed that the focal position was influenced by the wavelength. The focal position is formed by a direct wave and an edge wave, and when the aperture angle is small, the influence of the edge wave becomes large. When the influence of the edge wave is large, the focal position varies depending on the wavelength of the ultrasonic wave, but the frequency to calculate the wavelength differs according to the evaluation method. In the JIS standard, the frequency is obtained by FFT of the reflection signal, but in calculating the wavelength it is better to calculate from the signal period.
Keyword (in Japanese) (See Japanese page) 
(in English) Focused Ultrasonic / Ultrasonic Probe / Focal Point / Frequency / Edge Wave / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 155, US2017-40, pp. 49-53, July 2017.
Paper # US2017-40 
Date of Issue 2017-07-20 (US) 
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 US  
Conference Date 2017-07-27 - 2017-07-27 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To US 
Conference Code 2017-07-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Focus and Frequency Evaluation of Focused Ultrasonic Probe Using Concave Transducer 
Sub Title (in English)  
Keyword(1) Focused Ultrasonic  
Keyword(2) Ultrasonic Probe  
Keyword(3) Focal Point  
Keyword(4) Frequency  
Keyword(5) Edge Wave  
1st Author's Name Yuusuke Tanaka  
1st Author's Affiliation Japan Probe Co., Ltd. (Japan Probe)
2nd Author's Name Junnichi Kitada  
2nd Author's Affiliation Japan Probe Co., Ltd. (Japan Probe)
3rd Author's Name Yukio Ogura  
3rd Author's Affiliation Japan Probe Co., Ltd. (Japan Probe)
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Date Time 2017-07-27 14:50:00 
Presentation Time 25 
Registration for US 
Paper # IEICE-US2017-40 
Volume (vol) IEICE-117 
Number (no) no.155 
Page pp.49-53 
#Pages IEICE-5 
Date of Issue IEICE-US-2017-07-20 

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