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基于二维阵列的三维成像在实现上具有阵元多、通道数多、系统复杂、回波信号弱等困难。从阵列探头的设计着手,分析了时间空间信号在离散有限长窗函数下的行为特点,推导出阵列探头设计的一般规则;在此基础上,利用脉冲回波场理论,通过计算机模拟,设计了8×8二维阵列探头,并利用该阵列实现了相控阵超声三维体数据的扫查和显示。实验表明,该系统和阵列探头具有良好的性能,扫查所得人工缺陷的三维超声图像提供了很好的轮廓、走向等信息。
Based on two-dimensional array of three-dimensional imaging in the realization of the array with more elements, the number of channels, the system is complex, the echo signal is weak and so difficult. From the design of the array probe, the behavior characteristics of the space-time signal under the discrete finite-length window function are analyzed and the general rules of the array probe design are derived. Based on the theory of the pulse echo field and the computer simulation, 8 × 8 two-dimensional array of probes, and the use of the array to achieve phased array ultrasound three-dimensional volume data scanning and display. Experiments show that the system and the array probe have good performance, scanning the resulting artificial defects of the three-dimensional ultrasound images provide a good profile, to the other information.