Multi-dimensional velocity estimation with ultrasound using spatial quadrature
Multi-dimensional velocity estimation with ultrasound using spatial quadrature
复制标题
DOI：
10.1109/58.677757
复制
发表时间：
1998-05-01
影响因子：
3.6
通讯作者：
Anderson, ME
中科院分区：
文献类型：
--
作者：
Anderson, ME
传统的超声运动或流速估计仅限于轴向速度分量。介绍了一种新的技术，称为“空间正交”，用于同时估计轴向和横向速度分量。该技术利用具有正交关系的点扩展函数的偶数和奇数空间加权。这些加权在接收到的回波中产生调制，该调制可以被解码为横向运动量。该估计器可以利用常规换能器阵列和医学超声扫描器（优选地具有并行接收处理的换能器阵列和医学超声扫描器）来实现二维速度估计。该技术也可以扩展到三维速度估计给出一个适当的2-D换能器和扫描器architecture. Discussion是空间和频域的描述，这种估计的背景下，简要概述了2-D流量估计方法，包括分析表征性能包络的估计。此外，还讨论了该技术在CW和PW方案以及射频和基带正交（I和Q）数据中的应用。体模研究使用临床扫描仪在2-D中展示空间正交。
Conventional ultrasonic motion or flow velocity estimation is limited to the axial velocity component. A novel technique, called "spatial quadrature," for the simultaneous estimation of axial and lateral velocity components is introduced. This technique utilizes even and odd spatial weightings of the point spread function that have a quadrature relationship. These weightings produce modulation in the received echo that can be decoded to quantity lateral motion. This estimator can be implemented for two-dimensional velocity estimation with a conventional transducer array and medical ultrasound scanner, preferably one with parallel receive processing. The technique also can be extended to three-dimensional velocity estimation given an appropriate 2-D transducer and scanner architecture.Discussed are space and frequency domain descriptions of this estimator in the context of a brief overview of 2-D flow estimation methods, including analyses characterizing the performance envelope of this estimator. In addition, the application of this technique in CW and PW regimes, and with both radio frequency and baseband quadrature (I-and-Q) data, are discussed. Phantom studies demonstrate spatial quadrature in 2-D using a clinical scanner.