胶囊内窥镜图像采集系统设计

Design of Image Acquisition System for Capsule Endoscopy

研制了一种用于消化道图像采集并无线传送至体外的数字图像采集系统,该系统的图像传感器采用Microchip公司的CMOS数字图像传感器MT9D131。该图像传感器内嵌有JPEG压缩功能,可显著减小图像数据量,并降低对无线传送的带宽要求。生成的图像压缩数据由挪威Norcdic公司的无线射频收发一体芯片nRF24L01传送至体外,接收端接收到的数据通过串口传送至上位机。实验结果证明,该图像采集系统成像质量好,可以用于诊疗胶囊内窥镜的原型设计。

For improving the diagnosis of the entire gastrointestinal（GI） tract,a novel kind of digital wireless image acquisition system for capsule endoscopy is introduced.This image acquisition system is designed based on MT9D131 and nRF24L01.The MT9D131 has a JPEG engine,it can significantly reduce the amount of image data and lower the requirements of wireless transmission.The acquired image data is transmitted by Nordic Company＇s RF chip nRF24L01.Then,the received data is transmitted to PC by the serial port interface.The experimental results show that the image has good quality and can be used in the prototype design of diagnosis and treatment capsule endoscopy.