红外医学成像系统的设计

发布时间：2018-03-30 13:54

本文选题：红外成像仪　切入点：XC6SLX100　出处：《聊城大学》2015年硕士论文

【摘要】：医用红外成像系统可以被动地接受人体散发的红外辐射,是一种新型绿色检查方式。与以往的常规诊断方法相比,具有对人体无辐射、无损伤、无接触等优点,在医疗中发挥着越来越重要的作用。但是目前国内大部分的红外成像仪要从国外引进,不但价格昂贵,操作起来也很复杂,所以研制一种操作简单、性能优良的红外成像仪越来越受到人们的关注。本系统就是基于以上问题提出的。本文通过调研分析国内外医用红外成像仪的研究现状,设计了一款简单、易操作、性能良好的医用红外成像系统。本系统主要包括硬件部分和软件部分。硬件部分包括图像获取、图像采集传输两部分;软件部分包括图像采集模块软件设计、图像传输模块软件设计和上位机软件设计三大部分。图像获取部分采用11mm的红外镜头,非制冷焦平面机芯探测器,具有响应快、分辨率高、像元间距小、灵敏度高等优点。图像采集传输部分开发出了基于DSP+FPGA的采集传输的硬件设计方案。DSP选用TMS320C6416,FPGA选用XC6SLX100,两者相互结合实现优势互补,将充分发挥TMS320C6416自带PCI总线的强大性能和XC6SLX100的灵活性。对于模拟信号的采集,为了防止干扰源对图像信号的干扰以及确保各种信号的逻辑关系,模拟信号在模数转换之前进行了视频同步分离,一方面提高了视频质量,另一方面方便视频处理。采集传输与上位机之间的数据交换采用PCI接口,利用PCI传输速度较快的特点满足了数据量大的图像传输任务。软件部分,对图像采集、图像传输和上位机这三部分进行了软件设计,实现了图像的实时显示、存储和回放等功能。基于以上设计,本系统具有能够实现384×288像素图像的实时显示、存储、回放、免调焦并快速便捷的捕捉图像等功能,能够满足设计上小型化、低功耗、便捷等要求,在医学中具有较高的应用价值。
[Abstract]:Medical infrared imaging system can passively accept infrared radiation emitted by human body. It is a new type of green inspection method. Compared with the conventional diagnostic methods, it has the advantages of no radiation, no damage, no contact and so on. It plays a more and more important role in medical treatment. But at present, most of the infrared imagers in China are to be imported from abroad, which are not only expensive, but also very complicated to operate, so it is easy to develop a kind of infrared imager. More and more people pay attention to the infrared imager with excellent performance. This system is put forward based on the above problems. Through the investigation and analysis of the research status of the medical infrared imager at home and abroad, a simple and easy to operate infrared imager is designed. The system mainly includes hardware part and software part. The hardware part includes two parts: image acquisition and image acquisition and transmission. The software part includes the software design of image acquisition module. Image transmission module software design and host computer software design three parts. Image acquisition part using 11mm infrared lens, uncooled focal plane core detector, with fast response, high resolution, small pixel spacing, In the part of image acquisition and transmission, the hardware design scheme of acquisition and transmission based on DSP FPGA is developed. DSP chooses TMS320C6416FPGA to select XC6SLX100. The powerful performance of PCI bus and the flexibility of XC6SLX100 will be brought into full play by TMS320C6416. For the acquisition of analog signal, in order to prevent the interference source from interfering to the image signal and to ensure the logic relation of various signals, The analog signal is separated synchronously before analog-to-digital conversion. On the one hand, the video quality is improved; on the other hand, the video processing is facilitated. The data exchange between the acquisition and transmission and the host computer adopts PCI interface. The fast transmission speed of PCI can satisfy the task of image transmission with large amount of data. In the software part, the three parts of image acquisition, image transmission and upper computer are designed, and the real-time display of the image is realized. Based on the above design, the system has the functions of real-time display, storage, playback, no focusing and fast and convenient capture of 384 脳 288 pixel images, and can meet the design of miniaturization, low power consumption, etc. Convenience and other requirements have high application value in medicine.
【学位授予单位】：聊城大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP391.41;TN219

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