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首页> 外文期刊>Ultrasound in Medicine and Biology >Simultaneous Bilateral Real-Time 3-D Transcranial Ultrasound Imaging at 1 MHz Through Poor Acoustic Windows
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Simultaneous Bilateral Real-Time 3-D Transcranial Ultrasound Imaging at 1 MHz Through Poor Acoustic Windows

机译：通过差距窗口在1 MHz的同时双边实时3-D经颅超声成像

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摘要

Ultrasound imaging has been proposed as a rapid, portable alternative imaging modality to examine stroke patients in pre-hospital or emergency room settings. However, in performing transcranial ultrasound examinations, 8%-29% of patients in a general population may present with window failure, in which case it is not possible to acquire clinically useful sonographic information through the temporal bone acoustic window. In this work, we describe the technical considerations, design and fabrication of low-frequency (1.2 MHz), large aperture (25.3 mm) sparse matrix array transducers for 3-D imaging in the event of window failure. These transducers are integrated into a system for real-time 3-D bilateral transcranial imaging-the ultrasound brain helmet-and color flow imaging capabilities at 1.2 MHz are directly compared with arrays operating at 1.8 MHz in a flow phantom with attenuation comparable to the in vivo case. Contrast-enhanced imaging allowed visualization of arteries of the Circle of Willis in 5 of 5 subjects and 8 of 10 sides of the head despite probe placement outside of the acoustic window. Results suggest that this type of transducer may allow acquisition of useful images either in individuals with poor windows or outside of the temporal acoustic window in the field.
机译：超声成像已经提出作为一种快速，便携式的替代成像模型，用于检查医院预科或急诊室设置中的中风患者。然而，在进行经颅超声检查时，窗户故障可能存在8％-29％的普通群体，在这种情况下，不可能通过颞骨声窗中获取临床有用的超声信息。在这项工作中，我们描述了低频（1.2MHz），大孔径（25.3毫米）稀疏矩阵阵列换能器的技术考虑，设计和制造，在窗口故障时为3-D成像。这些换能器集成到用于实时3-D双侧经颅成像的系统中 - 将超声脑头盔和颜色流动成像能力与1.2MHz的阵列相比，与流动虚线在1.8MHz中运行的阵列进行比较，其衰减与进入相当体内案例。对于在声窗外放置，允许增强的成像在5个受试者中的5个受试者中的5个和头部的8个侧面中的8个，允许可视化。结果表明，这种类型的换能器可以允许在具有较差的窗户或场上的时间声窗口外部的个体中获取有用的图像。

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