公开(公告)号：US20080144904A1

公开(公告)日：2008-06-19

申请号：US10597713

申请日：2005-02-01

申请人： Jens Wiegert ,  Georg Rose ,  Jurgen Weese

发明人： Jens Wiegert ,  Georg Rose ,  Jurgen Weese

IPC分类号： G06K9/00

CPC分类号： G06T5/50 ,  G06T11/005 ,  G06T2207/30004

摘要： The invention relates to an apparatus and a method for the processing of reconstructed 3D images (I) in C-arm based volume imaging which often exhibit spatially slowly varying inhomogeneities caused by inconsistent projection data. To correct the images (I), a retrospective homogenization procedure is proposed. The image (I) is segmented (11, 12) into principal classes like bone, tissue and air based on their gray values. Only the tissue-regions (M) are then used as support in order to fit (14) a spatially slowly varying 2D baseline (B) representing the smooth shape of cupping or other inhomogeneities. Finally the inverse of the estimated 2D baseline is subtracted from the original slice (I) to correct for the inhomogeneities.

摘要翻译： 本发明涉及一种用于处理基于C臂的体积成像中的重建3D图像（I）的装置和方法，其经常表现出由不一致的投影数据引起的空间上缓慢变化的不均匀性。 为了校正图像（I），提出了回顾性均匀化程序。 图像（I）根据其灰度值被分段（11,12）成主要类，如骨，组织和空气。 然后仅使用组织区域（M）作为支撑体，以便适应（14）代表拔罐或其他不均匀性的平滑形状的空间上缓慢变化的2D基线（B）。 最后，从原始切片（I）中减去估计的2D基线的逆，以校正不均匀性。

公开(公告)号：US6144759A

公开(公告)日：2000-11-07

申请号：US18985

申请日：1998-02-05

申请人： Jurgen Weese ,  Thorsten Buzug ,  Graeme P. Penney ,  David J. Hawkes

发明人： Jurgen Weese ,  Thorsten Buzug ,  Graeme P. Penney ,  David J. Hawkes

IPC分类号： A61B6/03 ,  G06T1/00 ,  G06T11/00 ,  G06K9/00

CPC分类号： G06T11/003

摘要： The invention relates to a method of determining the spatial transformation between an object which is three-dimensionally reproduced by a data set and the object itself. According to the method at least one X-ray image of the object is formed. A pseudo-projection image is calculated for a part of the volume represented by the data set, said pseudo-projection image being compared with the X-ray image. The parameters on which the calculation of the pseudo-projection image is based are varied until optimum registration is achieved.

摘要翻译： 本发明涉及一种确定由数据集三维再现的对象与对象本身之间的空间变换的方法。 根据该方法，形成物体的至少一个X射线图像。 对由数据组表示的体积的一部分计算伪投影图像，将所述伪投影图像与X射线图像进行比较。 伪投影图像的计算所基于的参数是变化的，直到达到最佳配准。

公开(公告)号：US07817829B2

公开(公告)日：2010-10-19

申请号：US10598745

申请日：2005-03-07

申请人： Gundolf Kiefer ,  Helko Lehmann ,  Jurgen Weese ,  Marc Busch

发明人： Gundolf Kiefer ,  Helko Lehmann ,  Jurgen Weese ,  Marc Busch

IPC分类号： G06K9/00 ,  G06T15/00

CPC分类号： G06T15/08 ,  G06T15/005

摘要： Medical imaging modalities generate increasingly more and very large three-dimensional data sets. According to an exemplary embodiment of the present invention, a three-dimensional data set of an object of interest is interactively visualized with a varying sampling rate in an image. Advantageously, a focus area may be moved by a user interactively during rendering, wherein the sampling rate of a particular part of the image is defined by its relative position to the focus area. Advantageously, this may allow for an improvement of an overall rendering performance.

摘要翻译： 医学成像模式产生越来越多和非常大的三维数据集。 根据本发明的示例性实施例，感兴趣对象的三维数据集在图像中以变化的采样率被交互地可视化。 有利地，焦点区域可以在渲染期间由用户交互地移动，其中图像的特定部分的采样率由其与焦点区域的相对位置来定义。 有利地，这可以允许改进整体渲染性能。

公开(公告)号：US20060110037A1

公开(公告)日：2006-05-25

申请号：US10521182

申请日：2003-07-15

申请人： Michael Kaus ,  Jurgen Weese

发明人： Michael Kaus ,  Jurgen Weese

IPC分类号： G06K9/34

CPC分类号： G06T7/149 ,  G06T7/12 ,  G06T2200/04 ,  G06T2207/10072 ,  G06T2207/30008 ,  G06T2207/30048

摘要： Deformable models are used for the segmentation of structures in 3D images. The basic principle of such methods consists of the adaptation of flexible meshes to the image. However, the simultaneous segmentation of multiple or composed objects often causes problems in that spatial relationships between the objects are violated, or that meshes are intersecting each other. According to the present invention, a priori knowledge about spatial relationships between objects is introduced into the shaped model. This allows to maintain spatial relationships between the objects and to avoid intersecting meshes.

摘要翻译： 可变形模型用于3D图像中的结构分割。 这种方法的基本原理包括将柔性网格适应图像。 然而，多个或组合对象的同时分割通常导致在对象之间的空间关系被违反或者网格彼此相交的问题。 根据本发明，将关于物体之间的空间关系的先验知识引入成形模型。 这允许保持对象之间的空间关系并避免相交的网格。

公开(公告)号：US20050226527A1

公开(公告)日：2005-10-13

申请号：US10520988

申请日：2003-07-08

申请人： Jurgen Weese ,  Peter Roesch ,  Angela Da Silva ,  Michael Petrillo

发明人： Jurgen Weese ,  Peter Roesch ,  Angela Da Silva ,  Michael Petrillo

IPC分类号： G01T1/161 ,  A61B5/00 ,  A61B6/03 ,  G06T5/00 ,  G06T5/50 ,  G06T7/20 ,  G06K9/40

CPC分类号： G06T5/50 ,  A61B6/5264 ,  G06T5/003 ,  G06T7/20 ,  G06T2207/10072 ,  G06T2207/20201 ,  G06T2207/30004

摘要： The invention relates to a method in which the information contents of an image of a moving object is enhanced. The invention also relates to a system in which such a method can be carried out and to a computer program enabling a data processing unit to carry out such a method. The method is used notably in the field of medical imaging systems. According to the method first a first image of a moving object is acquired by means of a first imaging method, said image containing artifacts which are caused by the object motion. From two further images, acquired by means of a second imaging respective state of motion of the motion, there is formed a motion model which is implemented in a different manner in image processing or image forming steps, so that the information contents of either the first image or a combination image, formed from the first image and the two further images, is enhanced.

摘要翻译： 本发明涉及一种增强移动物体的图像的信息内容的方法。 本发明还涉及一种可以执行这种方法的系统以及使数据处理单元能够执行这种方法的计算机程序。 该方法特别用于医学成像系统领域。 根据该方法，首先通过第一成像方法获取移动物体的第一图像，所述图像包含由物体运动引起的假象。 从通过运动的相应运动状态的第二次成像获取的两个另外的图像，形成在图像处理或图像形成步骤中以不同的方式实现的运动模型，使得第一 增强了从第一图像和两个另外的图像形成的图像或组合图像。

公开(公告)号：US20070071172A1

公开(公告)日：2007-03-29

申请号：US10577098

申请日：2004-10-15

申请人： Sabine Mollus ,  Jurgen Weese

发明人： Sabine Mollus ,  Jurgen Weese

IPC分类号： H05G1/44

CPC分类号： A61B6/488 ,  A61B6/00 ,  A61B6/469 ,  A61B6/542 ,  A61B6/544

摘要： The invention relates to a device for adjusting imaging parameters of an X-ray apparatus (1), whereby a user pre-defines on a preliminary image an image region of interest (ROI) and a value of the contrast-to-noise ratio (CNRref) desired for this image region. Based on the current contrast-to-noise ratio (CNRm), new imaging parameters (I, V, L, f, Q0) are then calculated for a generator-control module (7) to control the X-ray apparatus (1) during an image. By means of the method, the X-ray dose may be reduced to a minimum, while at the same time the desired visibility of a region of interest is ensured.

摘要翻译： 本发明涉及一种用于调整X射线设备（1）的成像参数的设备，由此用户在初步图像上预先定义感兴趣的图像区域（ROI）和对比度噪声比值（ CNR ）对于该图像区域是期望的。 基于当前的对比噪声比（CNR），然后对于发生器计算新的成像参数（I，V，L，f，Q <0> 0） 控制模块（7），以在图像期间控制X射线设备（1）。 通过该方法，可以将X射线剂量降低到最小，同时确保感兴趣区域的期望的可见度。

公开(公告)号：US20060142984A1

公开(公告)日：2006-06-29

申请号：US10543394

申请日：2004-01-23

申请人： Jurgen Weese ,  Volker Rasche ,  Stewart Young ,  Babak Movassaghi

发明人： Jurgen Weese ,  Volker Rasche ,  Stewart Young ,  Babak Movassaghi

IPC分类号： G06G7/48 ,  G06G7/58 ,  G06K9/00

CPC分类号： G06T7/11 ,  G06T7/55 ,  G06T2207/10121 ,  G06T2207/20156 ,  G06T2207/30101

摘要： The invention relates to a method for the computer-aided reconstruction of a three-dimensional anatomical object (3) from diagnostic image data. First of all, a diagnostic image data set of the object (3) is acquired. Then a seed point (5) is set, starting from which the object is reconstructed within a reconstruction volume (4). Thereafter, an adjacent point of the reconstruction volume (4) likewise belonging to the object (3) is located in accordance with a propagation criterion, which is calculated by means of a mathematical analysis of local areas (6, 7), assigned to the point concerned, of the image data set Reconstruction of the three-dimensional structure of the object (3) is then performed within the reconstruction volume (4) by multiple repetition of this method step and propagation along the located adjacent points. To apply such a reconstruction method to image data obtained by means of rotational X-ray imaging, wherein a plurality of two-dimensional projection images (1, 2) are recorded from different projection directions, the invention proposes that the propagation criterion be calculated by subjecting the local image areas (6, 7) of the two-dimensional projection images (1, 2) in each case individually to the mathematical analysis.

摘要翻译： 本发明涉及一种用于从诊断图像数据计算机辅助重构三维解剖体（3）的方法。 首先，获取对象（3）的诊断图像数据组。 然后设置种子点（5），从重建体积（4）中重建对象开始。 此后，同样属于对象（3）的重构体积（4）的相邻点根据通过局部区域（6,7）的数学分析计算的传播标准来定位，分配给 （3）的三维结构的重建然后通过该方法步骤的多次重复并且沿着定位的相邻点进行传播，在重建体积（4）内执行。 为了将这种重建方法应用于通过旋转X射线成像获得的图像数据，其中从不同的投影方向记录多个二维投影图像（1,2），本发明提出了传播标准由 在每种情况下对二维投影图像（1,2）的局部图像区域（6,7）进行数学分析。

公开(公告)号：US07742631B2

公开(公告)日：2010-06-22

申请号：US10598635

申请日：2005-03-03

申请人： Jurgen Weese ,  Marc Busch ,  Gundolf Kiefer ,  Helko Lehmann

发明人： Jurgen Weese ,  Marc Busch ,  Gundolf Kiefer ,  Helko Lehmann

IPC分类号： G06K9/00

CPC分类号： G06T15/503

摘要： High frequency signals cannot be reconstructed properly from sampled data if the sampling frequency lies below the Nyquist rate. The invention addresses this problem by choosing few additional sample points along a trajectory intersecting the region comprising the high frequency signals, such as an edge. Intermediate rendering data is used to determine the additional sample points. Therefore, according to an exemplary embodiment of the present invention, 4 adaptively chosen sample points per pixel may provide a visual quality comparable to 16 times super-sampling, but at a much lower computational cost.

摘要翻译： 如果采样频率低于奈奎斯特速率，则高频信号无法从采样数据中正确重建。 本发明通过沿着与包括高频信号的区域（例如边缘）相交的轨迹的几个附加采样点来解决这个问题。 中间渲染数据用于确定附加采样点。 因此，根据本发明的示例性实施例，每像素4个自适应选择的采样点可以提供与16次超采样相当的视觉质量，但是以低得多的计算成本。

公开(公告)号：US20080260231A1

公开(公告)日：2008-10-23

申请号：US10598305

申请日：2005-03-04

申请人： Jurgen Weese ,  Georg Rose

发明人： Jurgen Weese ,  Georg Rose

IPC分类号： G06K9/00

CPC分类号： G06T11/006 ,  A61B6/481 ,  A61B6/504 ,  A61B6/507 ,  G06T2211/424

摘要： The invention relates to an apparatus and a method for the reconstruction of time-dependent cross-sectional images and may be applied for example in perfusion imaging in the vessel system (2) of a patient. According to the method, projections pij are generated from a number M of different directions d and at different times tij. Moreover, the time-dependent intensity function I(x,t) of the reconstructed volume is approximated by a predetermined model function I*(a(x),t), wherein the unknown parameter vector a(x) is estimated for each voxel x. This estimation may be done using the update functions of known reconstruction algorithms like ART for at least N projections pij in each iteration step.

摘要翻译： 本发明涉及用于重建时间依赖性横截面图像的装置和方法，并且可以应用于例如在患者的血管系统（2）中的灌注成像。 根据该方法，从不同方向d的数M和不同时间t i上产生投影p i 。 此外，重建体积的时间依赖强度函数I（x，t）由预定的模型函数I *（（x），t））近似，其中未知参数向量 对于每个体素x估计U STYLE =“SINGLE”> a（x）。 可以在每个迭代步骤中使用已知的重建算法的更新功能（例如ART至少N个投影）来完成该估计。