摘要
为解决X射线在人体组织中的射束硬化效应对双能量图像分离的影响,本文作者采用与人体软组织吸收系数接近的有机玻璃测量X线的衰减系数,用二阶多项式拟合X线衰减的非线性性,求出拟合系数,在双能量X线图像减影之前对高、低能图像分别作非线性校正,取得了较好的效果。
The nonlinear attenuation of x-ray in tissue was measured to improve the accuracy of dual energy x-ray image separation. The attenuation coefficients versus tissue thickness was fitted with a second order polynomial with which the dual energy images were amended before subtracted to obtain the separated images.
出处
《北京生物医学工程》
2005年第3期176-179,共4页
Beijing Biomedical Engineering
基金
西安交通大学生物医学信息工程教育部重点实验室访问学者基金资助
