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只用一个连续多普勒发射/接收探头作二维多普勒成象的方法早已有人提出。但由于探头需要沿xy平面移动扫描,因此成象速度很低。本文作者提出一种提高每秒成象频数的方法。同时采用多个发送、接收探头、沿不同方向同时测量。探头的发射频率各不相同。样机(八个通道)的测试结果证明:1.各通道间声波的交互作用对各通道的横向分辨率没有影响,对灵敏度也无影响;2.可以同时对
Methods that use only one continuous Doppler transmit / receive probe for two-dimensional Doppler imaging have long been proposed. However, the imaging speed is low because the probe needs to be moved along the xy plane for scanning. The authors propose a method to increase the frequency of imaging per second. Simultaneous use of multiple transmit and receive probes simultaneously measures in different directions. Probe launch frequency varies. The test results of the prototype (eight channels) prove that: 1. The interaction of sound waves between channels has no influence on the lateral resolution of each channel, and has no influence on the sensitivity; 2. Simultaneous