计算机辅助肺部小病灶穿刺定位系统的建立

目的：在“肺癌早期诊断立体定位仪”的基础上，利用计算机技术，研制一个新型的同步实时三维X线定位穿刺诊断系统，方法：该系统模拟利用两台X线机，从两个不同的角度同时获取图像，采用计算机图像处理和计算机视觉技术进行处理，以获得病灶和穿刺针的三维信息。结果：两台X线机可以较好地模拟一台双球管双C臂的X线机，完成两路图像的实时同步采集。实验表明两束X光在成像时相互之间没有干扰，系统的平均定位误差约为0．5mm，最大定位误差约为1．0mm，实时显示速度为4帧／秒，结论：实验结果表明，应用计算机技术研制一个新型同步实时三维立体定位系统，从理论和实践上是可行的。本系统无论是硬件配置，还是软件性能，都可以满足临床实用的需要。

Creation of a computer - assisted real - time localization system for early diagnosis of lung cancer

ve:On the basis of the stereoscopic localization device for early diagnosis of lung cancer, computer technique is used to creat a real - time synchronous 3D localization X - ray system. Methods: Two X - ray devices are adopted to simulate a double C - arm X - ray device to grab image from two different planes, then the computer image processing and computer vision technique are used to treat the images so as to obtain 3D information and reconstruct a 3D images for small lung lesion and fine needle. Results: The two x - ray devices assisted by computer can simulate one double - tube X - ray device. It can grab images and reconstruct 3D image in real time and synchronously. The experimental results show that the two beams of x - ray don't interfere each other when imaging, the average localization error of system is 0. 5mm, and the maximum error is 1. 0mm, the display rate is about 4 frame/s. Conclusion:The experimental results show that it's practical both in theory and in practice to research a new type real - time synchronous 3Dlocatlion system assisted by computer. Both the configuration of hardware and the performance of software can satisfy the clinical practice.