Near-Real-Time 3D Ultrasonic Strain Imaging
Near-Real-Time 3D Ultrasonic Strain Imaging
复制标题
近实时 3D 超声波应变成像
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
R. Prager
中科院分区：
文献类型：
--
作者：
Graham M. Treece;Je Lindop;A. Gee;R. Prager
本文描述了一种使用机械扇形传感器采集和显示 3D 超声应变图像的近实时系统。为了提高图像质量和鲁棒性，所有信号处理都是完全 3D 的，包括 3D 数据窗口、用于位移应变计算的 3D 最小二乘拟合、3D 应变归一化以及轴向、横向和高度方向的完整位移跟踪。尽管进行了彻底的信号处理，但通常可以在执行扫描后 20 秒内检查 3D 应变体积，无需特殊硬件。该速度是通过轴向方向上的迭代相位零位移跟踪以及横向和高度方向上的跟踪新方法来实现的。由于位移跟踪不依赖于换能器表面常见的（但脆弱的）零位移假设，因此可以可靠地获得高质量的应变图像。该论文包括体外应变图像的示例，以及采集和处理时间的完整细节。
This paper describes a near-real-time system for acquiring and displaying 3D ultrasonic strain images using a mechanical sector transducer. For improved image quality and robustness, all signal processing is fully 3D, including 3D data windows, 3D least-squares fitting for the displacement-to-strain calculation, 3D strain normalization and full displacement tracking in the axial, lateral and elevational directions. Notwithstanding this thorough signal processing, 3D strain volumes are typically available for inspection within 20 seconds of performing the scan, with no need for special hardware. The speed is achieved by iterative phase-zero displacement tracking in the axial direction and novel methods for tracking in the lateral and elevational directions. Since the displacement tracking does not rely on the common (but brittle) zero-displacement assumption at the transducer face, high quality strain images are obtained reliably. The paper includes examples of in vitro strain images with full details of the acquisition and processing times.