公开(公告)号：US20050013404A1

公开(公告)日：2005-01-20

申请号：US10498291

申请日：2003-01-23

申请人： Stefan Kasperl ,  Ulf Hassler ,  Ingo Bauscher ,  Stefan Schroepfer

发明人： Stefan Kasperl ,  Ulf Hassler ,  Ingo Bauscher ,  Stefan Schroepfer

IPC分类号： G01T1/164 ,  G01T1/29 ,  G21K1/12 ,  A61B6/00 ,  G01N23/00 ,  H05G1/60

CPC分类号： G01T1/1648 ,  G01T1/2985

摘要： An apparatus for establishing a correction characteristic curve for a reduction of artefacts in a tomography comprises a means for providing projection data of the object, wherein the projection data comprise transmission values for the object, a means for calculating a representation of the object from the projection data, to obtain two or three-dimensional representation data for the object, a means for determining a measure for the transmission length of the object by using the representation data, a means for determining a transmission value, which is associated to the determined measure for the transmission length, and a means for generating the correction characteristic curve of several determined measures for transmission lengths and associated transmission values, wherein a precorrection of the projection data can be performed by using the determined correction characteristic curve, to iteratively determine the correction characteristic curve by using the precorrected transmission values. This concept for establishing a correction characteristic curve requires no reference object measurements or other information about the condition of the radiation source, the object, etc.

摘要翻译： 一种用于建立用于在断层摄影术中减少伪影的校正特性曲线的装置包括用于提供对象的投影数据的装置，其中投影数据包括对象的传输值，用于从投影计算对象的表示的装置 数据，以获得用于对象的二维或三维表示数据，用于通过使用表示数据确定对象的传输长度的度量的装置，用于确定传输值的装置，其与所确定的测量相关联 传输长度，以及用于产生用于传输长度和相关传输值的若干确定测量值的校正特性曲线的装置，其中可以通过使用所确定的校正特性曲线来执行投影数据的预校正，以迭代地确定校正特性曲线 通过使用预校正的传输 离子值。 用于建立校正特性曲线的概念不需要参考物体测量或关于辐射源，物体等的条件的其它信息。