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| Presentation | 2011-06-23 15:15 Visualization of therapeutic ultrasound fields using image subtraction Schlieren technique -- Visualization of Fields in Small Chamber -- Hiroki Obara, Nobuki Kudo, Koichi Shimizu (Hokkaido Univ.)  US2011-18 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Recently, there has been considerable interest in sonoporation, a technique to transduct drugs or genes into cells by ultrasound exposure. In typical studies of sonoporation using cultured cells, the cells and microbubbles are suspended in a culture dish with medium, and exposed to continuous ultrasound waves. In this situation, reflection of ultrasound at a medium-air interface and dish walls produces complex acoustic fields with various standing waves. In this study, the pressure fields of therapeutic ultrasound in a small chamber are visualized using a newly proposed technique called image-subtraction Schlieren. Observation results revealed that brightness of visualized fields is doubled in the presence of reflection and that brightness is decreased adjacent to the chamber wall. It was also confirmed that perturbation of water surface by acoustic streaming causes decrease in pressure amplitudes at antinodes. The linear relation found between brightness of the Schlieren images and acoustic pressure indicates the importance of the image-subtraction Schlieren technique for dosimetry of complex acoustic fields generated inside small chambers. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | ultrasound field / pressure distribution / visualization / Schlieren / image subtraction / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 88, US2011-18, pp. 31-35, June 2011. | |
| Paper # | US2011-18 | |
| Date of Issue | 2011-06-16 (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 | US2011-18 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2011-06-23 - 2011-06-23 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2011-06-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Visualization of therapeutic ultrasound fields using image subtraction Schlieren technique |
| Sub Title (in English) | Visualization of Fields in Small Chamber |
| Keyword(1) | ultrasound field |
| Keyword(2) | pressure distribution |
| Keyword(3) | visualization |
| Keyword(4) | Schlieren |
| Keyword(5) | image subtraction |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hiroki Obara |
| 1st Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 2nd Author's Name | Nobuki Kudo |
| 2nd Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 3rd Author's Name | Koichi Shimizu |
| 3rd Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-06-23 15:15:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2011-18 |
| Volume (vol) | vol.111 |
| Number (no) | no.88 |
| Page | pp.31-35 |
| #Pages | 5 |
| Date of Issue | 2011-06-16 (US) |
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