公开(公告)号：US5377249A

公开(公告)日：1994-12-27

申请号：US980974

申请日：1992-11-24

申请人： Karl Wiesent ,  Ernstpeter Ruehrnschopf ,  Johannes Ebersberger

发明人： Karl Wiesent ,  Ernstpeter Ruehrnschopf ,  Johannes Ebersberger

IPC分类号： A61B6/03 ,  G01T1/29 ,  G01N23/083

CPC分类号： A61B6/032 ,  A61B6/4028 ,  G01T1/2985 ,  Y10S378/901

摘要： A computer tomography apparatus has an anode in the form of a partial ring along which a focus is electronically moved to generate a scan beam from different directions, and a partial ring detector which generates a number of data sets from the attenuated radiation at the different directions, includes a computer wherein the data sets are weighted independently of the measured values so that image reconstruction can be undertaken with a standard computer tomography method, such as convolution and back-projection. The weighting is selected so that the boundaries of regions having constant values represent smooth curves in the sinogram. The image can thereby be reconstructed without complementary interpolation, which is normally required in computer tomography systems having a partial ring x-ray source and detector.

摘要翻译： 计算机断层摄影装置具有呈部分环形式的阳极，沿着该阳极电子移动聚焦以从不同方向产生扫描光束;以及部分环形检测器，其从不同方向的衰减辐射产生多个数据集 包括计算机，其中数据集被独立于测量值加权，使得可以使用诸如卷积和反投影的标准计算机断层摄影方法进行图像重建。 选择加权使得具有恒定值的区域的边界表示正弦图中的平滑曲线。 因此，无需互补插值即可重建图像，这是在具有部分环X射线源和检测器的计算机断层摄影系统中通常需要的。

公开(公告)号：US07462832B2

公开(公告)日：2008-12-09

申请号：US11455249

申请日：2006-06-16

申请人： Ernstpeter Ruehrnschopf

发明人： Ernstpeter Ruehrnschopf

IPC分类号： G01T1/161

CPC分类号： G01T1/24 ,  A61B6/5258

摘要： A device and a method for computer tomography are described, in which an uncorrected volume image and a correction volume image are overlaid by the user after selection of a weighting function. This enables manual correction to be undertaken even after the correction of interference effects, such as x-ray scattering or beam hardening.

摘要翻译： 描述了用于计算机断层摄影的装置和方法，其中在选择加权函数之后，未校正的体积图像和校正体积图像被用户覆盖。 这使得即使在修正干涉效应（例如x射线散射或光束硬化）之后也能进行手动校正。

公开(公告)号：US20060284099A1

公开(公告)日：2006-12-21

申请号：US11455249

申请日：2006-06-16

申请人： Ernstpeter Ruehrnschopf

发明人： Ernstpeter Ruehrnschopf

IPC分类号： G01T1/166

CPC分类号： G01T1/24 ,  A61B6/5258

摘要： A device and a method for computer tomography are described, in which an uncorrected volume image and a correction volume image are overlaid by the user after selection of a weighting function. This enables manual correction to be undertaken even after the correction of interference effects, such as x-ray scattering or beam hardening.

摘要翻译： 描述了用于计算机断层摄影的装置和方法，其中在选择加权函数之后，未校正的体积图像和校正体积图像被用户覆盖。 这使得即使在修正干涉效应（例如x射线散射或光束硬化）之后也能进行手动校正。

公开(公告)号：US5666391A

公开(公告)日：1997-09-09

申请号：US669931

申请日：1996-06-25

申请人： Bernd Ohnesorge ,  Ernstpeter Ruehrnschopf ,  Klaus Klingenbeck-Regn

发明人： Bernd Ohnesorge ,  Ernstpeter Ruehrnschopf ,  Klaus Klingenbeck-Regn

IPC分类号： A61B6/03 ,  G01N23/04 ,  H05G1/60

CPC分类号： A61B6/5282 ,  G01N23/046 ,  G01N2223/419

摘要： An x-ray examination apparatus with a detector array having a number of detector elements includes a data correction computer in which the subject-scattered radiation can be numerically determined and corrected. The forward scatter intensity is determined by multiplication of the measured intensities, windowed with a window function, with the natural logarithm of the intensity normalized with the unattenuated primary intensity. The subject-scattered radiation can then be calculated and corrected through filtering of the forward scatter intensity with a convolution kernel and a suitable scaling.

摘要翻译： 具有检测器元件数量的检测器阵列的X射线检查装置包括数据校正计算机，其中可以数字地确定和校正被摄体散射的辐射。 前向散射强度通过用窗函数加窗的测量强度乘以与未衰减的初始强度归一化的强度的自然对数来确定。 然后可以通过使用卷积核和合适的缩放过滤前向散射强度来计算和校正主体散射辐射。