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| Presentation | 2016-06-17 13:00 Visualization of ultrasound fields in transparent media with attenuation using image subtraction schlieren technique Yukina Iijima, Nobuki Kudo (Hokkaido Univ.)  MBE2016-13 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | To consider safety of medical ultrasound equipment, it is important to evaluate a pressure waveform inside the body. Currently, pressure waveforms in the body are estimated by correction of pressure waveforms measured in water considering ultrasound attenuation in biological tissues. However, it is difficult to correct frequency-dependent attenuation of wade band pulses propagating tissues with non-liner propagation effect. In this study, acoustic fields of an ultrasound pulse propagating a transparent medium with ultrasound attenuation were visualized using the image subtraction Schlieren technique. Pressure waveforms of the pulse were also measured using a membrane hydrophone and were compared with brightness change curves derived from the visualized field images and also with 1st-order integration of the brightness curves. The experimental results that used castor oil as the medium revealed that the integrated brightness curves are in better agreement with the pressure waveforms. Frequency spectrum analysis confirmed good agreement of attenuation coefficients derived from the pressure waveforms and the integrated brightness curves, suggesting the usefulness of the technique not only for visualization of ultrasound fields but also for evaluation of pressure waveforms and ultrasound attenuation. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | ultrasound fields / pressure distribution / visualization / schlieren / image subtraction / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 116, no. 104, MBE2016-13, pp. 21-25, June 2016. | |
| Paper # | MBE2016-13 | |
| Date of Issue | 2016-06-10 (MBE) | |
| 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 | MBE2016-13 |
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| Conference Information | |
| Committee | MBE |
| Conference Date | 2016-06-17 - 2016-06-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MBE |
| Conference Code | 2016-06-MBE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Visualization of ultrasound fields in transparent media with attenuation using image subtraction schlieren technique |
| Sub Title (in English) | |
| Keyword(1) | ultrasound fields |
| Keyword(2) | pressure distribution |
| Keyword(3) | visualization |
| Keyword(4) | schlieren |
| Keyword(5) | image subtraction |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yukina Iijima |
| 1st Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 2nd Author's Name | Nobuki Kudo |
| 2nd Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
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| Speaker | Author-1 |
| Date Time | 2016-06-17 13:00:00 |
| Presentation Time | 25 minutes |
| Registration for | MBE |
| Paper # | MBE2016-13 |
| Volume (vol) | vol.116 |
| Number (no) | no.104 |
| Page | pp.21-25 |
| #Pages | 5 |
| Date of Issue | 2016-06-10 (MBE) |
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