摘要
分析了探测器位姿误差对三维CT重建图像质量的影响,计算机模拟和MTF曲线对比结果表明:探测器沿x、y、z方向的位移不会对重建质量产生影响,只影响断层的位置。而其绕x、y、z三坐标轴的摆动会对重建图像质量造成影响,偏摆角控制在"0.2°以内、俯仰角控制在"1.0°以内、扭转角控制在"0.4°以内即可满足重建图像的质量要求,从而为实际的三维CT系统设计提供依据。
The influence on the 3D-CT reconstruction images caused by the position and pose errors of the detector was analyzed.Through computer simulation and MTF curve comparison it was concluded that the displacement along X,Y and Z directions did not influence on the quality of the CT reconstruction images,while the swing around the coordinate axis could affect the quality of the CT images.In order to ensure the CT image quality,the swing angle should not exceed 0.2°,the pitching angle should not exceed 1°,and the turning angle should not exceed 0.4°.The conclusion can be used to guide practical 3D-CT system designs.
出处
《中国体视学与图像分析》
2011年第3期243-247,共5页
Chinese Journal of Stereology and Image Analysis
基金
国家科技支撑项目(2011BAI02B02)
