利用kV级CBCT识别标记物研究  

Study on Marker Recognition Using kV CBCT

作　　者：赵鑫[1] 田龙[1] 席强[1] ZHAO Xin;TIAN Long;XI Qiang(Department of Radiotherapy,The First Affiliated Hospital of Hebei North University,Zhangjiakou Hebei 075000,China)

机构地区：[1]河北北方学院附属第一医院放疗科,河北张家口075000

出　　处：《中国医疗设备》2019年第3期41-44,共4页China Medical Devices

摘　　要：目的利用kV级CBCT和金球投影位置自动跟踪算法,计算模体中标记物最小识别角度。方法使用CBCT扫描内植标记物的模体,获得球管于0°到359.96°所拍摄图像集合;使用金球投影位置自动跟踪算法,分析计算图像集合中任意两张获得准确定位标记物三维空间坐标所需的最小角度间隔。结果通过任意两张图像确定模体内标记物三维空间坐标所需最小角度间隔为4.16°。结论该算法对CBCT扫描图像处理结果可行,不过仍需提高软硬件水平从而获得更精确结果。Objective Using kV CBCT and golden globe projection position automatic tracking algorithm, we aimed to calculate the minimum recognition angle of the marker in the module. Methods The implanted markers were scanned by CBCT, and the image group of the ball tube from 0° to 359.96° was obtained. Then, the golden globe projection position automatic tracking algorithm was used to analyze and calculate any two images to determine the minimum angle interval of positing the 3D coordinate accurately. Results The minimum angle interval for positing the 3D coordinate of marker in phantom using any two images was 4.16°. Conclusion This algorithm is feasible for CBCT scan image processing results, but it still needs to improve the software and hardware level to obtain more accurate results.

关 键 词：CBCT 内植标记物 识别角度 

分 类 号：R812[医药卫生—放射医学]