中文摘要：

提出了虚拟仪器B型超声波诊断仪的概念和体系结构，介绍了虚拟仪器结构的B型超声波诊断仪的硬件系统设计与实现．着重介绍了仪器硬件的一些关键电路设计，以及提高仪器性能的途径和方法，

英文摘要：

The concept and architecture of virtual instrument B mode scan ultrasonograph had been proposed. The hardware design and implementation of virtual instrument B mode scan ultrasonograph had been introduced. The design of key circuits of the instrument had been emphasized. Furthermore, the approaches to improve the performance of the instrument had been discussed.