静态锥束CT成像系统的几何标定方法研究
发布时间：2019-01-29 19:18
【摘要】：采用X射线源阵列的静态CT成像系统为消除机械运动伪影,提高重建图像质量以及扫描成像效率提供了有效途径。高效、准确的几何标定方法是对X射线源阵列标定的关键。提出通过对一个已知三维标定模板的一次投影成像,采用最小二乘的直接线性变换法实现X射线成像系统的内、外参数准确估计的方法,以此方法用于静态CT扫描成像系统的几何标定。实验和仿真结果表明,该标定方法无需辅助装置,避免了满足要求条件的多次投影成像的过程;不受标定模板空间姿态的限制,一个X射线源与探测器的几何标定只需一次投影成像过程,方法简单、准确、易于操作,适于平面探测器的静态锥束X射线源阵列的成像系统几何参数的准确标定。
[Abstract]:The static CT imaging system using X-ray source array provides an effective way to eliminate the artifact of mechanical motion, improve the quality of reconstructed image and improve the efficiency of scanning imaging. Efficient and accurate geometric calibration method is the key to the calibration of X-ray source array. This paper presents a method of accurate estimation of the inner and outer parameters of X-ray imaging system by using the least square direct linear transformation method through the primary projection imaging of a known 3D calibration template. This method is used for geometric calibration of static CT scanning imaging system. The experimental and simulation results show that the calibration method does not need auxiliary devices and avoids the process of multiple projection imaging which meets the requirements. The geometric calibration of an X-ray source and detector requires only one projection imaging process, which is simple, accurate and easy to operate. Accurate calibration of geometric parameters of imaging system for static cone-beam X-ray source array suitable for planar detectors.
【作者单位】： 西安理工大学机械与精密仪器工程学院;弗吉尼亚理工大学生物医学工程与机械学院;
【基金】：国家自然科学基金(51305346,51405382)项目资助
【分类号】：TH774
[Abstract]:The static CT imaging system using X-ray source array provides an effective way to eliminate the artifact of mechanical motion, improve the quality of reconstructed image and improve the efficiency of scanning imaging. Efficient and accurate geometric calibration method is the key to the calibration of X-ray source array. This paper presents a method of accurate estimation of the inner and outer parameters of X-ray imaging system by using the least square direct linear transformation method through the primary projection imaging of a known 3D calibration template. This method is used for geometric calibration of static CT scanning imaging system. The experimental and simulation results show that the calibration method does not need auxiliary devices and avoids the process of multiple projection imaging which meets the requirements. The geometric calibration of an X-ray source and detector requires only one projection imaging process, which is simple, accurate and easy to operate. Accurate calibration of geometric parameters of imaging system for static cone-beam X-ray source array suitable for planar detectors.
【作者单位】： 西安理工大学机械与精密仪器工程学院;弗吉尼亚理工大学生物医学工程与机械学院;
【基金】：国家自然科学基金(51305346,51405382)项目资助
【分类号】：TH774
【参考文献】
相关期刊论文 前8条
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