公开(公告)号：US09715744B2

公开(公告)日：2017-07-25

申请号：US14567557

申请日：2014-12-11

申请人： GE Medical Systems Global Technology Co. LLC

发明人： Dan Liu ,  Xueli Wang ,  Yanling Qu

IPC分类号： G06K9/00 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60 ,  G01D18/00 ,  G06T11/00 ,  G01N23/04 ,  A61B6/03

CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/5205 ,  A61B6/5258 ,  A61B6/583 ,  G01N23/046 ,  G06T2207/10081

摘要： The present invention relates to a method and device of obtaining a beam hardening correction coefficient for carrying out beam hardening correction on computed tomography data. The method includes the steps of: firstly, acquiring an original reconstructed image and an original sinogram of an object of a particular size; secondly, obtaining an error-reduced sinogram after processing the original reconstructed image by error reduction; thirdly, sampling and calculating an average value of the original sinogram and an average value of the error-reduced sinogram; fourthly, optimizing the original sinogram according to the error-reduced sinogram to determine a coefficient vector of optimization function for the object of the particular size; and finally fitting the coefficient vector of the optimization function of the original sinogram to obtain the beam hardening correction coefficient for the object of the particular size.

公开(公告)号：US20160171725A1

公开(公告)日：2016-06-16

申请号：US14567557

申请日：2014-12-11

申请人： GE Medical Systems Global Technology Co. LLC

发明人： Dan Liu ,  Xueli Wang ,  Yanling Qu

IPC分类号： G06T11/00 ,  G01T7/00 ,  G01N23/04

CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/5205 ,  A61B6/5258 ,  A61B6/583 ,  G01N23/046 ,  G06T2207/10081

摘要： The present invention relates to a method and device of obtaining a beam hardening correction coefficient for carrying out beam hardening correction on computed tomography data. The method includes the steps of: firstly, acquiring an original reconstructed image and an original sinogram of an object of a particular size; secondly, obtaining an error-reduced sinogram after processing the original reconstructed image by error reduction; thirdly, sampling and calculating an average value of the original sinogram and an average value of the error-reduced sinogram; fourthly, optimizing the original sinogram according to the error-reduced sinogram to determine a coefficient vector of optimization function for the object of the particular size; and finally fitting the coefficient vector of the optimization function of the original sinogram to obtain the beam hardening correction coefficient for the object of the particular size.

摘要翻译： 本发明涉及获得用于对计算机断层摄影数据进行光束硬化校正的光束硬化校正系数的方法和装置。 该方法包括以下步骤：首先获取特定尺寸的对象的原始重建图像和原始正弦图; 其次，通过误差减少处理原始重建图像后获得误差减小的正弦图; 第三，采样和计算原始正弦图的平均值和误差减小的正弦图的平均值; 第四，根据误差减小的正弦图优化原始正弦图，以确定特定大小的对象的优化函数的系数向量; 最后拟合原始正弦图的优化函数的系数向量，以获得特定大小的对象的光束硬化校正系数。