摘要
目的研制新型的用于肺小病灶穿刺诊断的同步实时跟踪 X 线立体定位系统。方法采用 X 线电视影像技术及 X 线准直技术,结合双 C 臂双管 X 线机,从垂直向和水平向2个不同平面同步实时获取图像,经计算机图像处理和计算机视觉处理,确定并动态跟踪肺小病灶和穿刺细针的三维空间位置。结果垂直和水平向同时相交成像的两束 X 射线之间没有干扰,可以完成两路图像的同步实时采集,实现正常呼吸状态下肺部小病灶和穿刺细针空间位置的同步实时跟踪。组建的 X 线立体定位系统的平均定位误差为0.5 mm 左右,最大定位误差为1.0 mm 左右,实时显示速度为5帧/s。结论建立一种新型的双 C 臂双管同步实时跟踪 X 线立体定位系统是可行的,为肺小病灶同步实时跟踪立体定位穿刺肺癌早期诊断提供了可能。
Objective To evaluate the feasibility of a new type of real-time three-dimensional X-ray positioning system for aspiration biopsy of small lung lesions. Methods Using X-ray imaging technology and X-ray collimator technology and combining with double-C-ann X-ray machine, two different synchronous real-time images were obtained from the vertical to the horizontal plane. Then, with the computer image processing and computer vision processing technologies, dynamic tracking for 3D information of a pulmonary lesion and the needle in aspiration, and the relative position of the two, were established. Results There was no interference while the two imaging perpendicularly X-ray beam met, two synchronous real-time image acquisition and tracking of a lung lesion and a needle could be completed in free respiration. The average positioning system error was about 0. 5 mm, the largest positioning error was about 1.0 mm, real-time display rate was 5 screen/sec. Conclusions the establishment of a new type of double-C-ann synchronous real-time X-ray positioning system is feasible. It is available for the fast and accurate aspiration biopsy of small lung lesions.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2007年第12期1353-1356,共4页
Chinese Journal of Radiology
基金
国家"九五"重点科技攻关计划(96-906-01-18)
国家"十五"重点科技攻关项目(2001BA703811)
关键词
肺肿瘤
放射摄影术
胸部
图像处理
计算机辅助
Lung neoplasms
Radiography, thoracic
Image processing, computer-assisted
