Shock wave–bubble interaction near soft and rigid boundaries during lithotripsy: numerical analysis by the improved ghost fluid method

Kobayashi, Kazumichi; Kodama, Tetsuya; Takahira, Hiroyuki

Physics in Medicine and Biology, 2011, 56(19), 6421-6440

Permalink : https://hdl.handle.net/2115/47143

このアイテムのアクセス数:1,250件（2026-03-13 20:32 集計）

閲覧可能ファイル 

ファイル フォーマット サイズ 閲覧回数 説明
HUSCAP_Revised_kobayashi_kodama_takahira_PMB_2011 pdf 2.28 MB 2,066

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

アクセス権
open access
URI
https://hdl.handle.net/2115/47143
タイトル
Shock wave–bubble interaction near soft and rigid boundaries during lithotripsy: numerical analysis by the improved ghost fluid method
著者
Kobayashi, Kazumichi ; Kodama, Tetsuya ; Takahira, Hiroyuki
著者名
Kobayashi, Kazumichi
著者名
Kodama, Tetsuya
著者名
Takahira, Hiroyuki
言語
英語
キーワード
Fluid dynamics
Computational physics
Medical physics
Biological physics
発行日
2011-09-15
収録物名
Physics in Medicine and Biology
巻(号)
56(19)
ページ
6421-6440
抄録
In the case of extracorporeal shock wave lithotripsy (ESWL), a shock wave–bubble interaction inevitably occurs near the focusing point of stones, resulting in stone fragmentation and subsequent tissue damage. Because shock wave–bubble interactions are high-speed phenomena occurring in tissue consisting of various media with different acoustic impedance values, numerical analysis is an effective method for elucidating the mechanism of these interactions. However, the mechanism has not been examined in detail because, at present, numerical simulations capable of incorporating the acoustic impedance of various tissues do not exist. Here, we show that the improved ghost fluid method (IGFM) can treat shock wave–bubble interactions in various media. Nonspherical bubble collapse near a rigid or soft tissue boundary (stone, liver, gelatin and fat) was analyzed. The reflection wave of an incident shock wave at a tissue boundary was the primary cause for the acceleration or deceleration of bubble collapse. The impulse that was obtained from the temporal evolution of pressure created by the bubble collapse increased the downward velocity of the boundary and caused subsequent boundary deformation. Results of this study showed that the IGFM is a useful method for analyzing the shock wave–bubble interaction near various tissues with different acoustic impedance.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
権利情報
Copyright © (2011) IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in [Physics in Medicine and Biology]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher-authenticated version is available online at [10.1088/0031-9155/56/19/016].
PISSN
0031-9155
EISSN
1361-6560
NCID
AA00774048
関連情報
PMID
21918295
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1088/0031-9155/56/19/016