医用红外实时成像系统的设计

Design of medical infrared real-time imaging system

目的:针对目前医用红外成像系统的诸多缺陷,设计一种基于非制冷焦平面阵列红外探测器的医用红外实时成像系统。方法:设计的系统硬件部分由光学系统、红外探测器、热图采集与预处理电路,以及用于图像显示与处理的便携式计算机等组成;系统软件主要包括原始图像数据的获取与校正模块、图像实时处理与显示模块、伪彩处理模块以及图像保存与离线分析模块等4个功能部分;并针对像元的非均匀性提出了两点校验算法,提高了成像质量。结果:医用红外实时成像系统无需制冷,使用方便,整机温度分辨率为0.1℃,测温范围为-20℃～100℃,使用环境温度范围为0℃～40℃,实时成像速度为25帧/s,满足临床需要。结论:实验证明,本红外成像系统可快速实时成像,能满足临床检查需要。

Objective To design a novel medical infrared real-time imaging system based on uncooled focal plane assembly（UFPA）.Methods The hardware includes optics,infrared detector,thermal image acquisition ＆ pre-treatment circuit and portable computer.The software includes original image data acquisition and correction module,image real-time treatment and display module,pseudo-color treatment module and image storage and off-line analysis module.Two points revising method was proposed aiming at the unevenness of pixel.Results Dispensing with refrigeration,the resolution of medical infrared real-time imaging system was 0.1℃.The measuring temperature ranged from-20℃ to 100℃ with ambient temperature ranging from 0℃～40℃.The real-time imaging speed was 25 frame/s.Conclusion The medical infrared real-time imaging system can form infrared image in real-time,which meets the requirement of clinical application.