基于USB2.0的医用内窥镜超声探头旋转扫描成像系统

Revolving Ultrasonic Probe for Medical Endoscope Imaging System Based on USB2.0

介绍基于USB2.0接口的医用超声内窥镜旋转扫描成像的设计与实现。根据超声成像的特点,本系统采取脉冲回波成像方式,文中介绍了超声波激发、接收电路以及收发隔离电路。针对旋转扫描的特点,设计了基于FPGA的同步控制电路和基于USB2.0接口的数据传输电路。对采集到的原始图像,进行坐标变换,获得了按直角坐标显示的灰度图像。利用连续旋转马达对实际物体扫描成像的实验结果,验证了系统的正确性。

This paper mainly introduces the design and implementation of rotary wanning imaging for Endoscopic Ultrasonography System based on US132.0. The ultrasonic pulse-echo imaging technique has been used. In the paper, we simply introduce the emission circuit, receiving circuit and isolation circuit. According to the character of rotary scanning, we design the synchronous control circuit based on FPGA and data transmission circuit based on USB2.0. Finally the original polar coordinate image is transformed to rectangular coordinate grey image through coordinate transformation. The system performances have been validated by the experimental result gotten by scanning a specific object with continuous rotary motor.