Real-Time Monitoring of Shear Wave Traveling in Liver Tissue In Vivo
Real-Time Monitoring of Shear Wave Traveling in Liver Tissue In Vivo
复制标题
实时监测体内肝组织中传播的剪切波
DOI：
10.1143/jjap.43.3241
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发表时间：
2004
影响因子：
1.5
通讯作者：
Shin Akimoto
中科院分区：
文献类型：
--
作者：
Hideyuki Machida;S. Yagi;Y. Kondo;Yutaka Murata;Shin Akimoto
作为一种“超声可视化触诊”，对活体组织内部或外部应力引起的组织动态响应进行实时成像有望提高临床触诊的诊断质量和准确性。因此，我们已经研究了一种实时成像系统的局部组织位移沿着超声束扫描整个活组织，实现了简单的，但面向组织的生理和动态彩色成像在传统的B型屏幕上。系统性能是相当支持的数字信号处理器的一个灵活的设计，连续的二维复杂的斑点回波帧之间的实时局部互相关。通过明确地观察组织模型中由外部应力引起的剪切波的传播，研究了通过心跳局部受压的生理性肝组织传播的剪切波的实时观察。因此，我们可以确认特征剪切波传播模式的内应力与心跳同步。
Real-time imaging of tissue dynamic response caused by internal or external stress forces acting across a living tissue is promising for improving diagnostic quality and accuracy of clinical palpation as an “ultrasonic visualized palpation”. Thus we have investigated a real-time imaging system of local tissue displacement along an ultrasonic beam scanned across the living tissue, which realized straightforward but tissue-oriented physiological and dynamic color imaging on a conventional B-mode screen. System performance is fairly supported by a flexible design of a digital signal processor for real-time local cross correlation between successive two-dimensional complex speckle echo frames. Propagation of shear waves raised by external stress in a tissue phantom was clearly observed, so that real-time observation of shear wave traveling across a physiological liver tissue locally stressed by heartbeats was studied. As a result, we could confirm the characteristic shear wave propagation pattern by internal stress synchronous with heartbeat.