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1. 发明申请

US20100246918A1 ITERATIVE EXTRA-FOCAL RADIATION CORRECTION IN THE RECONSTRUCTION OF CT IMAGES 审中-公开
标题翻译：重建CT图像中的迭代超焦点辐射校正
公开(公告)号：US20100246918A1
公开(公告)日：2010-09-30
申请号：US12730664
申请日：2010-03-24
申请人： Steffen Kappler , Ernst-Peter Rührnschopf , Bernhard Scholz , Karl Stierstorfer
发明人： Steffen Kappler , Ernst-Peter Rührnschopf , Bernhard Scholz , Karl Stierstorfer
IPC分类号： G06K9/00 , H05G1/60
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/481 , A61B6/482 , A61B6/503 , A61B6/504 , A61B6/507 , A61B6/541 , G06T11/005 , G06T2211/424
摘要： A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been recorded during a rotating movement of a radiation source of a computed tomography system around the object under examination. The radiation source emits focal and extra-focal radiation. In at least one embodiment of the method, the image data is determined from the measurement data by use of an iterative algorithm. A variable is used in the iterative algorithm which contains a distribution of the extra-focal radiation.
摘要翻译：公开了一种用于从测量数据重建被检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源围绕被检查物体的旋转运动期间已经记录了测量数据。辐射源发出焦点和超焦距辐射。在该方法的至少一个实施例中，通过使用迭代算法从测量数据确定图像数据。在包含超焦距辐射分布的迭代算法中使用变量。

2. 发明授权

US07856134B2 Method for generating image data relating to a virtually prescribable X-ray tube voltage from first and second CT image data 有权
标题翻译：用于从第一和第二CT图像数据生成与虚拟规定的X射线管电压有关的图像数据的方法
公开(公告)号：US07856134B2
公开(公告)日：2010-12-21
申请号：US12457973
申请日：2009-06-26
申请人： Ernst-Peter Rührnschopf , Martin Sedlmair , Karl Stierstorfer
发明人： Ernst-Peter Rührnschopf , Martin Sedlmair , Karl Stierstorfer
IPC分类号： G06K9/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4035 , A61B6/4241 , A61B6/482
摘要： A method for generating image data relating to a virtually prescribable X-ray tube voltage U3 from first and second dual energy CT image data is disclosed. In at least one embodiment, the method includes providing the first and second CT image data; prescribing the virtual X-ray tube voltage U3 with U3≠U1 and U3≠U2, on the basis of the first and second CT image data for two prescribable base materials A, B; determining in each case a spatial density distribution ρA(x), ρB(x), assigned to the base materials A, B, in the reconstructed object volume, ρ(x)=ρA(x)+ρB(x) holds true for a density ρ(x) of a voxel x in the reconstructed object volume; providing an effective mass attenuation coefficient U3 for the base material A, and an effective mass attenuation coefficient U3 for the base material B, the effective mass attenuation coefficients U3 and U3 respectively being valid for an X-ray spectrum S(E, U3) assigned to the virtual X-ray tube voltage U3; and determining the image data as a third distribution of linear attenuation coefficients μ3(x) in the reconstructed object volume on the basis of the following relationship: μ3(x)= U3·ρA(x)+ U3·ρB(x).
摘要翻译：公开了一种从第一和第二双能量CT图像数据生成与虚拟规定的X射线管电压U3有关的图像数据的方法。在至少一个实施例中，该方法包括提供第一和第二CT图像数据; 以U3≠U1和U3≠U2的虚拟X射线管电压U3为基础，基于两个可处方的基材A，B的第一和第二CT图像数据; 在每种情况下确定分配给重建对象体积中的基础材料A，B的空间密度分布和（r）A（x），（r），（x），（x）=＆rgr; A（x）+ ＆rgr; B（x）对于重建对象体积中的体素x的密度和（r）（x）是正确的; 为基材A提供有效的质量衰减系数<αA> U3，对于基材B有效的质量衰减系数<αB> U3，有效质量衰减系数αA> U3和<αB> U3分别对分配给虚拟X射线管电压U3的X射线光谱S（E，U3）基于以下关系，将图像数据确定为重建对象体积中的线性衰减系数μ3（x）的第三分布：μ3（x）= <αA> U3·＆rgr; A（x）+ <αB> U3·＆rgr; B（x）。

3. 发明申请

US20100014737A1 Method for generating image data relating to a virtually prescribable x-ray tube voltage from first and second CT image data 有权
标题翻译：用于从第一和第二CT图像数据产生与虚拟规定的X射线管电压有关的图像数据的方法
公开(公告)号：US20100014737A1
公开(公告)日：2010-01-21
申请号：US12457973
申请日：2009-06-26
申请人： Ernst-Peter Rührnschopf , Martin Sedlmair , Karl Stierstorfer
发明人： Ernst-Peter Rührnschopf , Martin Sedlmair , Karl Stierstorfer
IPC分类号： G06K9/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4035 , A61B6/4241 , A61B6/482
摘要： A method for generating image data relating to a virtually prescribable X-ray tube voltage U3 from first and second dual energy CT image data is disclosed. In at least one embodiment, the method includes providing the first and second CT image data; prescribing the virtual X-ray tube voltage U3 with U3≠U1 and U3≠U2, on the basis of the first and second CT image data for two prescribable base materials A, B; determining in each case a spatial density distribution ρA(x), ρB(x), assigned to the base materials A, B, in the reconstructed object volume, ρ(x)=ρA(x)+ρB(x) holds true for a density ρ(x) of a voxel x in the reconstructed object volume; providing an effective mass attenuation coefficient U3 for the base material A, and an effective mass attenuation coefficient U3 for the base material B, the effective mass attenuation coefficients U3 and U3 respectively being valid for an X-ray spectrum S(E, U3) assigned to the virtual X-ray tube voltage U3; and determining the image data as a third distribution of linear attenuation coefficients μ3(x) in the reconstructed object volume on the basis of the following relationship: μ3(x)= U3·ρA(x)+ U3·ρB(x).
摘要翻译：公开了一种从第一和第二双能量CT图像数据生成与虚拟规定的X射线管电压U3有关的图像数据的方法。在至少一个实施例中，该方法包括提供第一和第二CT图像数据; 以U3U1和U3U2为基础的虚拟X射线管电压U3，根据两个可处方基材A，B的第一和第二CT图像数据; 在每种情况下确定分配给重建对象体积中的基材A，B的空间密度分布rhoA（x），rhoB（x），rho（x）= rhoA（x）+ rhoB（x）对于重建对象体积中体素x的密度rho（x）; 为基材A提供有效的质量衰减系数3和基材B的有效质量衰减系数3，有效质量衰减系数3和3分别对于分配的X射线光谱S（E，U3）有效到虚拟X射线管电压U3; 并根据以下关系确定图像数据为重建对象体积中的线性衰减系数mu3（x）的第三分布：mu3（x）= 3.rhoA（x）+ 3.rhoB（x）。

4. 发明申请

US20130004051A1 METHOD FOR ACQUIRING A 3D IMAGE DATASET FOR AN IMAGE OBJECT 有权
标题翻译：用于获取图像对象的3D图像数据的方法
公开(公告)号：US20130004051A1
公开(公告)日：2013-01-03
申请号：US13527843
申请日：2012-06-20
申请人： Klaus Klingenbeck , Ernst-Peter Rührnschopf , Bernhard Scholz
发明人： Klaus Klingenbeck , Ernst-Peter Rührnschopf , Bernhard Scholz
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/416 , G06T2211/424
摘要： A method for acquiring a 3D image dataset for an image object based on a plurality of 2D image datasets relating to the image object is proposed. A scattered radiation is taken into account in an acquisition operator used in the method for the optimum reconstruction of the 3D image dataset. The acquisition operator should be as close as possible to the real mapping operator.
摘要翻译：提出了一种基于与图像对象相关的多个2D图像数据集获取图像对象的3D图像数据集的方法。在用于3D图像数据集的最佳重建的方法中使用的采集算子中考虑散射辐射。采集操作员应尽可能靠近真实的映射运算符。

5. 发明授权

US08150131B2 Computer tomography method for determining an object region with the aid of projection images 有权
标题翻译：借助于投影图像确定对象区域的计算机断层摄影方法
公开(公告)号：US08150131B2
公开(公告)日：2012-04-03
申请号：US12317061
申请日：2008-12-18
申请人： Wolfgang Härer , Ernst-Peter Rührnschopf , Bernhard Scholz
发明人： Wolfgang Härer , Ernst-Peter Rührnschopf , Bernhard Scholz
IPC分类号： G06K9/00 , G06K9/48 , H01L27/00
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4441 , G01N2223/401 , G01N2223/419 , G01N2223/421 , G01N2223/612
摘要： In a computer tomography method an object region of the object being examined is determined in that projection beams that are linked with maximum attenuation are sought in cropped projection images. A central point of the object region is then determined and the object sections associated with the projection beams plotted on the central point. The object region can be at least approximately determined using the end points of the object sections.
摘要翻译：在计算机断层摄影方法中，确定被检查物体的物体区域是在裁切的投影图像中寻找与最大衰减相关联的投影光束。然后确定对象区域的中心点，并将与投影光束相关联的对象部分绘制在中心点上。可以使用对象部分的端点至少近似地确定对象区域。

6. 发明授权

US07711083B2 Method for reconstructing a three-dimensional image volume and x-ray devices 有权
标题翻译：重建三维图像体积和x射线装置的方法
公开(公告)号：US07711083B2
公开(公告)日：2010-05-04
申请号：US11897348
申请日：2007-08-30
申请人： Benno Heigl , Stefan Hoppe , Joachim Hornegger , Ernst-Peter Rührnschopf , Holger Scherl , Bernhard Scholz , Michael Zellerhoff
发明人： Benno Heigl , Stefan Hoppe , Joachim Hornegger , Ernst-Peter Rührnschopf , Holger Scherl , Bernhard Scholz , Michael Zellerhoff
IPC分类号： A61B6/00
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , A61B6/4458 , G01N2223/419 , G01N2223/612
摘要： To enable an artifact free reconstruction even in the case of large regions of interest and with scanning paths of below 360°, provision is made for a method, with which a three-dimensional image volume is reconstructed from a number of two-dimensional projection images of a region of interest, which were recorded about the region of interest during a rotation of a recording system, comprising an x-ray source with a focal point and a detector, by calculating the gray scale values of the voxels of the image volume by back projection of the projection images, with which each two-dimensional projection images is composed in each instance from at least two individual projection images to form an extended two-dimensional projection image, with the respectively at least two individual projection images being recorded with a constant relative position between the focal point and the region of interest.
摘要翻译：为了即使在感兴趣的大区域和360度以下的扫描路径的情况下也能够实现无伪影重建，提供一种方法，利用该方法从多个二维投影图像重建三维图像体积通过计算图像体积的体素的灰度值，通过计算图像体积的体素的灰度值，记录关于记录系统旋转期间的感兴趣区域的感兴趣区域，其包括具有焦点和检测器的x射线源投影图像的背投影，每个二维投影图像在每个实例中由至少两个单独的投影图像组成，以形成扩展的二维投影图像，分别具有至少两个单独的投影图像被记录有焦点和感兴趣区域之间的常数相对位置。

7. 发明授权

US07822172B2 Method for hardening correction in medical imaging 有权
标题翻译：医学影像硬化矫正的方法
公开(公告)号：US07822172B2
公开(公告)日：2010-10-26
申请号：US11973471
申请日：2007-10-09
申请人： Ernst-Peter Rührnschopf , Bernhard Scholz
发明人： Ernst-Peter Rührnschopf , Bernhard Scholz
IPC分类号： A61B6/03
CPC分类号： G01N23/04 , A61B6/583 , G06T11/005
摘要： The invention relates to a method for beam hardening correction in medical image. Beam hardening within the context of medical imaging projection image profiles are split up into a basic profile which is assigned to a homogeneous object area and into a detailed profile which is assigned to an inhomogeneous object area. On the basis of the basic profile and of the difference profile the mass occupancy of the different components in the object to be examined can be approximately determined. On the basis of the approximately determined mass occupancy the correction of the beam hardening can then be performed directly on the projection data.
摘要翻译：本发明涉及医用图像中的束硬化校正方法。在医学成像投影图像轮廓的上下文中的光束硬化被分割成基本轮廓，其被分配给均匀的对象区域和分配给不均匀对象区域的详细轮廓。基于基本轮廓和差异轮廓，可以近似地确定待检查对象中的不同部件的质量占有率。基于大致确定的质量占有率，可以直接对投影数据执行光束硬化的校正。

8. 发明授权

US07801266B2 Method for speeding up the scattered radiation correction in a computed tomography system 有权
标题翻译：在计算机断层摄影系统中加速散射辐射校正的方法
公开(公告)号：US07801266B2
公开(公告)日：2010-09-21
申请号：US11598190
申请日：2006-11-09
申请人： Alois Nöttling , Ernst-Peter Rührnschopf , Bernhard Scholz
发明人： Alois Nöttling , Ernst-Peter Rührnschopf , Bernhard Scholz
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/032 , A61B6/5282
摘要： The invention relates to a method for speeding up the scattered radiation correction in a computed tomography system with a radiation source and a detector constructed in large-area format with a number of rows of detectors, by which an object is scanned from numerous projection angles, uses the measured values for the attenuation of the radiation in generating projection data which is postprocessed for the purpose of reconstructing tomographic views, in doing which a beam hardening correction is applied directly to the projection data, whereby according to the invention the scattered radiation correction is also applied directly to the projection data.
摘要翻译：本发明涉及一种用于加速具有辐射源的计算机断层摄影系统中的散射辐射校正的方法，以及以大面积格式构造的具有多行检测器的检测器，通过该检测器从多个投影角度扫描物体，在产生投影数据的测量值中，为了重建断层图像而进行后处理的投影数据，在这样做时，将束强化校正直接应用于投影数据，由此根据本发明，散射辐射校正是也直接应用于投影数据。

9. 发明授权

US07734009B2 Angiographic x-ray diagnostic device for rotation angiography 有权
标题翻译：用于旋转血管造影的血管造影X线诊断装置
公开(公告)号：US07734009B2
公开(公告)日：2010-06-08
申请号：US11284235
申请日：2005-11-21
申请人： Thomas Brunner , Klaus Klingenbeck-Regn , Michael Maschke , Alois Nöttling , Ernst-Peter Rührnschopf , Bernhard Scholz , Bernd Schreiber , Norbert Karl Strobel , Karl Wiesent , Michael Zellerhoff
发明人： Thomas Brunner , Klaus Klingenbeck-Regn , Michael Maschke , Alois Nöttling , Ernst-Peter Rührnschopf , Bernhard Scholz , Bernd Schreiber , Norbert Karl Strobel , Karl Wiesent , Michael Zellerhoff
IPC分类号： G01N23/083 , H05G1/02
CPC分类号： G06T11/005 , A61B6/466 , A61B6/504 , G06T2211/404
摘要： The invention relates to an angiographic x-ray diagnostic device for rotation angiography with an x-ray emitter which can be moved on a circular path about a patient located on a patient support table, with an image detector unit which can moved on the circular path facing the x-ray emitter, with a digital image system for recording a plurality of projection images by means of rotation angiography, with a device for image processing, by means of which the projection images are reconstructed into a 3D volume image, and with a device for correcting physical effects and/or inadequacies in the recording system such as truncation correction, scatter correction, ring artifact correction, correction of the beam hardening and/or of the low frequency drop for the soft tissue display of projection images and the 3D volume images resulting therefrom.
摘要翻译：本发明涉及一种用X射线发射器进行旋转血管造影的血管造影X射线诊断装置，该X射线发射器可以围绕位于病人支撑台上的患者的圆形路径移动，图像检测器单元可在圆形路径上移动面对x射线发射器，具有用于通过旋转血管造影记录多个投影图像的数字图像系统，具有用于图像处理的装置，通过该装置将投影图像重建成3D体积图像，并且利用用于校正记录系统的物理效应和/或不足的装置，例如用于投影图像的软组织显示的截断校正，散射校正，环形伪影校正，光束硬化的校正和/或低频率下降以及3D体积由此产生的图像。

10. 发明授权

US08885908B2 Method for acquiring a 3D image dataset for an image object 有权
标题翻译：用于获取图像对象的3D图像数据集的方法
公开(公告)号：US08885908B2
公开(公告)日：2014-11-11
申请号：US13527843
申请日：2012-06-20
申请人： Klaus Klingenbeck , Ernst-Peter Rührnschopf , Bernhard Scholz
发明人： Klaus Klingenbeck , Ernst-Peter Rührnschopf , Bernhard Scholz
IPC分类号： G06K9/00 , G06T11/00
CPC分类号： G06T11/006 , G06T2211/416 , G06T2211/424
摘要： A method for acquiring a 3D image dataset for an image object based on a plurality of 2D image datasets relating to the image object is proposed. A scattered radiation is taken into account in an acquisition operator used in the method for the optimum reconstruction of the 3D image dataset. The acquisition operator should be as close as possible to the real mapping operator.
摘要翻译：提出了一种基于与图像对象相关的多个2D图像数据集获取图像对象的3D图像数据集的方法。在用于3D图像数据集的最佳重建的方法中使用的采集算子中考虑散射辐射。采集操作员应尽可能靠近真实的映射运算符。

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