基于ARM+FPGA的胶囊内窥镜体外装置的设计  

Design of Extracorporeal Apparatus of Capsule Endoscopy Based on ARM+FPGA

作　　者：王生华[1] 张思杰[1] 王越[1] 汪振兴[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《生物医学工程学杂志》2011年第5期936-940,共5页Journal of Biomedical Engineering

摘　　要：针对患者在使用消化道无线内窥镜(胶囊内窥镜)做病变检查时,需忍耐长时间固定姿势带来的烦恼,即使在便携式装置研发出来以后,也需依赖于计算机的问题,提出了一种基于ARM+FPGA的嵌入式解决方案。本方案以嵌入式ARM9处理器S3C2440为核心,通过可吞服内镜胶囊采集消化道内壁图像,无线传输至体外图像接收系统,利用视频解码芯片SAA7114H完成无线内窥镜的模拟NTSC制式视频图像的解码,并通过FPGA的逻辑控制将有效视频图像传输至S3C2440进行处理,最后在嵌入式Linux环境下,利用QT/Embedded编写友好的人机交互可视化用户终端,实现便携式脱机消化道实时视频图像的记录及参数设置。这样可使患者做检查时行动更加自由,并且检查时完全脱离计算机,同时提高医生的工作效率,使其更加智能化、人性化。Considering that the patients would bear the annoyance of fixed posture for long time when they are examined with gastrointestinal wireless endoscopy, even though portable devices have been developed, the treatments still depend on PC so much, we proposed an embedded solution based on ARM＋ FPGA. It used embedded ARM9 $3C2440 as processor core, collected images from digestive tract through capsule endoscopy which can be swallowed down there, and wirelessly transferred these images to the receiving system, then used video decoder chip SAATll4H for analog of NTSC video image decode. And under FPGA＇s logic controlling, effective digital video sig- nal was transferred to $3C2440 for further treatment. Finally within the embedded Linux environment, we pro- grammed the visual user interfaces using the QT/Embedded, realizing the offline record of the real-time video images of digestive tract portable and preferences. It can make patients move more freely and even without PC when exami- ning. In addition, the method greatly improves the efficiency of the doctor, and is more intelligent and with more hu- mane nature.

关 键 词：消化道无线内窥镜 视频解码 FPGA QT/EMBEDDED 

分 类 号：TH776.1[机械工程—仪器科学与技术]