Modeling sound transmission through the pulmonary system and chest with application to diagnosis of a collapsed lung
Modeling sound transmission through the pulmonary system and chest with application to diagnosis of a collapsed lung
复制标题
DOI：
10.1121/1.1452742
复制
发表时间：
2002-04-01
影响因子：
2.4
通讯作者：
Sandler, RH
中科院分区：
文献类型：
--
作者：
Royston, TJ;Zhang, X;Sandler, RH
本文从理论和实验两方面探讨了应用声频振动声波诊断气胸的可行性。假设是胸部对外部激励的声学响应会随着这种情况而改变。在实验犬研究中，通过气管内导管将外部声能引入气管。对于对照（非气胸）状态，假设声波主要通过气道传播，耦合到肺实质，然后直接传输到胸壁。相比之下，当存在气胸时，介入的空气对有效的声能传递提供了额外的障碍。通过肺系统和胸部区域到胸壁表面的声音传输的理论模型被开发，以更清楚地了解强度损失的机制时，气胸是存在的，相对于基线情况。这些模型预测显着降低时，气胸的声传输强度，在定性与实验测量。发展的模型，其扩展通过有限元分析，并与实验犬研究的比较进行了审查。(C)2002年美国声学学会。
A theoretical and experimental study was undertaken to examine the feasibility of using audible-frequency vibro-acoustic waves for diagnosis of pneumothorax, a collapsed lung. The hypothesis was that the acoustic response of the chest to external excitation would change with this condition. In experimental canine studies, external acoustic energy was introduced into the trachea via an endotracheal tube. For the control (nonpneumothorax) state, it is hypothesized that sound waves primarily travel through the airways, couple to the lung parenchyma, and then are transmitted directly to the chest wall. In contradistinction, when a pneumothorax is present the intervening air presents an added barrier to efficient acoustic energy transfer. Theoretical models of sound transmission through the pulmonary system and chest region to the chest wall surface are developed to more clearly understand the mechanisms of intensity loss when a pneumothorax is present, relative to a baseline case. These models predict significant decreases in acoustic transmission strength when a pneumothorax is present, in qualitative agreement with experimental measurements. Development of the models, their extension via finite element analysis, and comparisons with experimental canine studies are reviewed. (C) 2002 Acoustical Society of America.