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| Presentation | 2021-12-22 13:30 [Poster Presentation] Effect of temporal bone structure on ultrasound irradiation to the brain Hidehisa Suzuyama, Kazuki Miyashita (Doshisha Univ.), Yasuyo Kobayashi, Kozue Saito (Nara Medical Univ.), Mami Matsukawa (Doshisha Univ.)  US2021-47 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The Transcranial Doppler method (TCD) enables the measurement of cerebral blood flow velocity and detection of emboli by applying the ultrasound probe to the temporal bone window, orbital, or greater occipital foramen. However, measurements often become difficult in elderly women. Among various factors for this problem, we focused on the effect of cancellous structure in the diploe on the ultrasound penetration into the brain. Using a 2D digital bone model of the temporal bone in the horizontal and vertical directions, wave propagation through the skull bone was investigated by the Finite-Difference Time-Domain (FDTD) method. We fabricated digital bone models with similar structure but different BV/TV (Bone Volume/Total Volume) in diploe. Around BV/TV of 50%-60% (similar to the BV/TV of elderly women), the observed amplitude of ultrasound in the brain showed minimum values due to multiple reflection and scattering in the cancellous bone of diploe. The results suggest that structural changes such as osteoporosis may be one reason for the difficulty of TCD measurements. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | skull / ultrasound / propagation characteristics / cancellous bone / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 310, US2021-47, pp. 1-4, Dec. 2021. | |
| Paper # | US2021-47 | |
| Date of Issue | 2021-12-15 (US) | |
| ISSN | 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 | US2021-47 |
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| Conference Information | |
| Committee | EA US |
| Conference Date | 2021-12-22 - 2021-12-23 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Sojo University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonics, etc. |
| Paper Information | |
| Registration To | US |
| Conference Code | 2021-12-EA-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Effect of temporal bone structure on ultrasound irradiation to the brain |
| Sub Title (in English) | |
| Keyword(1) | skull |
| Keyword(2) | ultrasound |
| Keyword(3) | propagation characteristics |
| Keyword(4) | cancellous bone |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hidehisa Suzuyama |
| 1st Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 2nd Author's Name | Kazuki Miyashita |
| 2nd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 3rd Author's Name | Yasuyo Kobayashi |
| 3rd Author's Affiliation | Nara Medical University (Nara Medical Univ.) |
| 4th Author's Name | Kozue Saito |
| 4th Author's Affiliation | Nara Medical University (Nara Medical Univ.) |
| 5th Author's Name | Mami Matsukawa |
| 5th Author's Affiliation | Doshisha University (Doshisha Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-12-22 13:30:00 |
| Presentation Time | 120 minutes |
| Registration for | US |
| Paper # | US2021-47 |
| Volume (vol) | vol.121 |
| Number (no) | no.310 |
| Page | pp.1-4 |
| #Pages | 4 |
| Date of Issue | 2021-12-15 (US) |
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