HIGH-SPEED ULTRASOUND IMAGING

这是一项关于继续发展 高速并行处理的临床应用 超声相控阵成像系统。 过去一段 旨在提高Exploso系统性能的广泛研究 改进了仪器。 根据结果 建议将Explosscan方法扩展到生产 真实的3D超声图像。 新的二维阵列和接收 提出了一种处理结构，它允许64到1 接收模式中的并行性。 图像将显示在 标准的2-D显示器和规定，以允许 同时显示多个断层平面。 硬件 并将开发软件， 透视图像和真实的时间C模式图像。 定制VLSI电路的并入被预期以减少 系统复杂性和增强性能。 爆炸扫描 方法将被纳入两个真实的时间流成像 系统. 第一个是高速彩色多普勒装置， 这将有一个帧速率4倍高于 常规单位。 第二种方法使用斑点运动跟踪 而不是多普勒技术，因此独立于 由多普勒角度引入的误差。 流动的融入 利用多平面图像进行成像以产生3D流动图像是一种 额外的目标。 另一个目标是研究左的运动 心室高速成像，以评估 检测异常心室的机械相关性 去极化 所有三维图像和彩色多普勒结果将 与标准临床图像和其他多普勒结果进行比较。

This is a proposal for the continuation of work in the development and clinical application of parallel processed high speed ultrasound phased array imaging systems. Over the past period extensive studies aimed at improving Exploso system performance have resulted in improved instrumentation. Based on the results it is proposed to extend the Explososcan approach to producing real time 3-D ultrasound images. New 2-D arrays and receive processing architectures are proposed which would permit 64 to 1 parallelism in the receive mode. Images will be displayed on standard 2-D displays and provisions made to permit the simultaneous display of several tomographic planes. Hardware and software will be developed to permit the display of projection images with perspective and real time C-mode images. Incorporation of custom VLSI circuits are contemplated to reduce system complexity and enhance performance. Explososcan methods will be incorporated in two real time flow imaging systems. The first is a high speed color Doppler unit now under construction which will have a frame rate 4 times higher than conventional units. The second uses speckle motion tracking rather than Doppler techniques and consequently is independent of errors introduced by the Doppler angle. The incorporation of flow imaging with multiplanar images to produce 3-D flow images is an additional goal. Another goal is t study motion of the left ventricle with high speed imaging to assess the possibility of detecting mechanical correlates of abnormal ventricular depolarization. All 3-D images and color Doppler results will be compared with standard clinical images and other Doppler results.