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1. 发明授权

US09087404B2 Reconstruction for cone-beam computed tomography imaging with off-center flat panel detector 有权
标题翻译：用偏心平板检测器进行锥束计算机断层扫描成像的重建
公开(公告)号：US09087404B2
公开(公告)日：2015-07-21
申请号：US13697445
申请日：2011-04-25
申请人： Eberhard S. Hansis , Dirk Schaefer , Michael Grass
发明人： Eberhard S. Hansis , Dirk Schaefer , Michael Grass
IPC分类号： G01N23/04 , G06T1/00 , G06T11/00
CPC分类号： G06T11/008 , G06T11/006 , G06T2211/432
摘要： Computed tomography (CT) reconstruction includes reconstructing an axially extended reconstructed image from a measured cone beam x-ray projection data set (Pm), optionally having an off-center geometry. The reconstructing is performed for an extended volume (eFOV) comprising a reconstructable volume (rFOV) of the measured cone beam x ray data set that is extended along the axial direction. The projection data set may be weighted in the volume domain. Iterative reconstruction may be used, including initializing a constant volume and performing one or more iterations employing a first iterative update followed by one or more iterations employing a second, different iterative update. Alternatively, backprojection filtration (BPF) reconstruction may be used, including transforming the projection data set to a new geometry including finite differences between neighboring projection views and performing BPF using Hilbert filtering along a plurality of different directions and averaging the resultant reconstructed images to generate the final reconstructed image.
摘要翻译：计算机断层摄影（CT）重建包括从测量的锥形束X射线投影数据集（Pm）重建轴向延伸的重建图像，可选地具有偏心几何。对包括沿轴向延伸的测量的锥形束x射线数据集的可重建体积（rFOV）的扩展体积（eFOV）进行重建。投影数据集可以在体积域中加权。可以使用迭代重建，包括初始化恒定体积并且使用第一迭代更新执行一个或多个迭代，随后使用第二，不同迭代更新的一个或多个迭代。或者，可以使用反投影过滤（BPF）重建，包括将投影数据集变换为包括相邻投影视图之间的有限差异的新几何，并且使用沿着多个不同方向的希尔伯特滤波来执行BPF，并平均所得到的重建图像以产生最终重建图像。

2. 发明授权

US08478014B2 Apparatus for generating an image of moving object 有权
标题翻译：用于产生移动物体的图像的装置
公开(公告)号：US08478014B2
公开(公告)日：2013-07-02
申请号：US12990817
申请日：2009-05-05
申请人： Uwe Jandt , Dirk Schaefer , Michael Grass
发明人： Uwe Jandt , Dirk Schaefer , Michael Grass
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T7/564 , G06T2211/412
摘要： The present invention relates to an apparatus for generating an image of a moving object, wherein a movement of the object comprises a multiple of moving phases. The apparatus comprises a measured detection data providing unit (20) for providing measured detection data of the moving object, which have been detected by using a detection process and which are assigned to the moving phases. The apparatus comprises further a reconstruction unit (13) for reconstructing an image object of the object from the provided measured detection data and an adaptation unit (18) for adapting the image object for different moving phases such that simulated detection data are adapted to the measured detection data of the respective moving phase, wherein the simulated detection data are determined by simulating the detection process, which has been used for detecting the measured detection data assigned to the respective moving phase, with the image object.
摘要翻译：本发明涉及一种用于生成移动物体的图像的装置，其中物体的移动包括多个移动相位。该装置包括测量检测数据提供单元（20），用于提供已经通过使用检测处理检测并被分配给运动相位的移动物体的测量检测数据。所述设备还包括用于根据所提供的测量的检测数据重建对象的图像对象的重建单元（13）和用于使图像对象适应不同的移动阶段的适配单元（18），使得模拟的检测数据适应于所测量的检测数据，其中通过模拟已经用于检测分配给各个运动相位的测量检测数据的检测过程与图像对象来确定模拟检测数据。

3. 发明申请

US20130116551A1 3D-ORIGINATED CARDIAC ROADMAPPING 有权
标题翻译： 3D原版CARDIAC ROADMAPPING
公开(公告)号：US20130116551A1
公开(公告)日：2013-05-09
申请号：US13810292
申请日：2011-07-15
申请人： Raoul Florent , Vincent Auvray , Michael Grass , Dirk Schaefer , Gert Schoonenberg
发明人： Raoul Florent , Vincent Auvray , Michael Grass , Dirk Schaefer , Gert Schoonenberg
IPC分类号： A61B6/02
CPC分类号： A61B6/022 , A61B6/12 , A61B6/4441 , A61B6/463 , A61B6/487 , A61B6/504 , A61B6/5223 , A61B6/5235 , A61B2090/364 , A61B2090/367
摘要： The present invention relates to 3D-originated cardiac roadmapping. In order to improve the accuracy of the information provided to the user as navigation information, without any additional burden to the patient such as additional X-ray dose, a method is described comprising the steps of a) providing 3D+t image data of a vascular structure of an object; b) acquiring two-dimensional image data of the object, which object comprises the vascular structure, the 2D image data comprising at least one 2D image; c) projecting the vascular structure, thereby generating a plurality of mask images on the basis of a 3D+t image data; d) registering the at least one 2D image with one of the plurality of the mask images, wherein the registration comprises finding the maximum of a similarity factor between the mask images and the at least one 2D image; e) generating a combination of the at least one 2D image and a projection of the vascular structure on the basis of the 3D+t image data according to the registration; and f) displaying the combination as a guiding vessel tree projection. Thus improved cardiac roadmapping in form of a topographical roadmapping is provided since the roadmapping is based on three-dimensional data.
摘要翻译：本发明涉及3D起源的心脏路线图。为了提高作为导航信息提供给用户的信息的准确性，对病人没有任何额外的负担，例如额外的X射线剂量，描述了一种方法，其包括以下步骤：a）提供一个物体的血管结构; b）获取所述对象的二维图像数据，所述对象包括所述血管结构，所述2D图像数据包括至少一个2D图像; c）投影血管结构，从而基于3D + t图像数据生成多个掩模图像; d）使用所述多个掩模图像之一登记所述至少一个2D图像，其中所述注册包括找到所述掩模图像与所述至少一个2D图像之间的相似性因子的最大值; e）根据所述注册，基于所述3D + t图像数据生成所述至少一个2D图像和所述血管结构的投影的组合; 以及f）将组合显示为引导血管树投影。因此，由于路线图基于三维数据，所以提供了形成路面图的形式的改进的心脏路线图。

4. 发明申请

US20120089377A1 IMAGING PROCEDURE PLANNING 有权
标题翻译：成像程序规划
公开(公告)号：US20120089377A1
公开(公告)日：2012-04-12
申请号：US13321214
申请日：2010-05-12
申请人： Klaus Erhard , Michael Grass , Dirk Schaefer
发明人： Klaus Erhard , Michael Grass , Dirk Schaefer
IPC分类号： G06F17/50 , A61N5/00
CPC分类号： G06T11/005 , A61B6/032 , A61B6/488
摘要： A method includes generating with a processor (122) a three-dimensional subject specific model of structure of interest of a subject to be scanned based on a general three-dimensional model and pre-scan image data acquired by an imaging system (100) generating with the processor (122) an imaging plan for the subject based on the three-dimensional subject specific model.
摘要翻译：一种方法包括基于通常的三维模型和由成像系统（100）获取的预扫描图像数据，利用处理器（122）生成待扫描的对象的感兴趣结构的三维对象特定的模型，与处理器（122）基于三维主题特定模型的对象的成像计划。

5. 发明申请

US20100295846A1 FOUR-DIMENSIONAL RECONSTRUCTION OF REGIONS EXHIBITING MULTIPLE PHASES OF PERIODIC MOTION 有权
标题翻译：展示周期性运动的多个阶段的区域四维重建
公开(公告)号：US20100295846A1
公开(公告)日：2010-11-25
申请号：US12445752
申请日：2007-10-10
申请人： Dirk Schaefer , Michael Grass
发明人： Dirk Schaefer , Michael Grass
IPC分类号： G06T15/00
CPC分类号： G06T13/20 , A61B6/02 , A61B6/4441 , A61B6/503 , A61B6/504 , A61B6/541 , A61B8/13 , G06T11/006 , G06T2211/404 , G06T2211/412
摘要： A method for four dimensional reconstruction of regions exhibiting multiple phases of periodic motion includes the operation of building one or more 3-D reconstructions using a set of 2-D projections. The method further includes the operation of deriving one or more 3-D model segments from each of the one or more 3-D reconstructions, wherein a plurality of 3-D model segments are formed thereby, and wherein each of the one or more 3-D model segments is derived from a single one of the one or more 3-D model segments. The plurality of derived 3-D model segments forms a 4-D reconstruction of the region of interest.
摘要翻译：显示多个周期运动的区域的四维重建的方法包括使用一组2-D投影建立一个或多个3-D重建的操作。该方法还包括从一个或多个3-D重建中的每一个导出一个或多个3-D模型段的操作，其中由此形成多个3-D模型段，并且其中一个或多个3-D模型段中的每一个 -D模型段是从一个或多个3-D模型段中的单个模型段导出的。多个衍生的3D模型段形成感兴趣区域的4维重建。

6. 发明申请

US20100201786A1 METHOD AND APPARATUS FOR RECONSTRUCTING AN IMAGE 审中-公开
标题翻译：用于重构图像的方法和装置
公开(公告)号：US20100201786A1
公开(公告)日：2010-08-12
申请号：US12300185
申请日：2007-05-03
申请人： Dirk Schaefer , Michael Grass
发明人： Dirk Schaefer , Michael Grass
IPC分类号： H04N13/02 , G06K9/00
CPC分类号： G06T7/30 , G06T2207/30101
摘要： A reconstruction method for an image of an object under examination is provided, wherein the method comprises, receiving a first projection data set representing three-dimensional information about said object under examination and reconstructing at least one three-dimensional image out of the first projection data set. Further, a second projection data set representing two-dimensional information about the object under examination is received, wherein the second data set was recorded under a first direction and wherein a two-dimensional image out of the second projection data set is generated. Furthermore, a volume rendered projection is reconstructed out of the at least one three-dimensional image using the first direction as the reconstruction direction of the volume rendered projection and the two-dimensional image and the volume rendered projection are overlaid.
摘要翻译：提供了一种用于检查对象的图像的重建方法，其中所述方法包括：接收表示关于被检查对象的三维信息的第一投影数据集，并且从所述第一投影数据中重构至少一个三维图像组。此外，接收表示关于检查对象的二维信息的第二投影数据集，其中在第一方向记录第二数据集，并且其中生成第二投影数据集中的二维图像。此外，使用第一方向从所述至少一个三维图像中重建体绘制投影作为体绘制投影的重建方向，并且叠加二维图像和体积渲染投影。

7. 发明授权

US09672651B2 Four-dimensional reconstruction of regions exhibiting multiple phases of periodic motion 有权
公开(公告)号：US09672651B2
公开(公告)日：2017-06-06
申请号：US12445752
申请日：2007-10-10
申请人： Dirk Schaefer , Michael Grass
发明人： Dirk Schaefer , Michael Grass
IPC分类号： G06T13/20 , G06T11/00 , A61B6/02 , A61B6/00 , A61B8/13
CPC分类号： G06T13/20 , A61B6/02 , A61B6/4441 , A61B6/503 , A61B6/504 , A61B6/541 , A61B8/13 , G06T11/006 , G06T2211/404 , G06T2211/412
摘要： A method for four dimensional reconstruction of regions exhibiting multiple phases of periodic motion includes the operation of building one or more 3-D reconstructions using a set of 2-D projections. The method further includes the operation of deriving one or more 3-D model segments from each of the one or more 3-D reconstructions, wherein a plurality of 3-D model segments are formed thereby, and wherein each of the one or more 3-D model segments is derived from a single one of the one or more 3-D model segments. The plurality of derived 3-D model segments forms a 4-D reconstruction of the region of interest.

8. 发明授权

US09053535B2 Adaptive roadmapping 有权
标题翻译：自适应路线图
公开(公告)号：US09053535B2
公开(公告)日：2015-06-09
申请号：US13810680
申请日：2011-07-15
申请人： Raoul Florent , Vincent Auvray , Michael Grass , Dirk Schaefer , Gert Schoonenberg
发明人： Raoul Florent , Vincent Auvray , Michael Grass , Dirk Schaefer , Gert Schoonenberg
IPC分类号： G06K9/00 , G06T7/00 , A61B6/12 , A61B6/00 , A61B19/00 , G06T19/00
CPC分类号： G06T7/0012 , A61B6/12 , A61B6/463 , A61B6/487 , A61B6/504 , A61B6/5235 , A61B90/37 , A61B2090/364 , A61B2090/365 , A61B2090/3764 , G06T7/32 , G06T19/00 , G06T2207/10121 , G06T2207/30101
摘要： An adaptive roadmapping device and method for examination of an object include providing pre-navigation image data representing part of the object being a vascular structure including an element of interest and having a tree-like structure with a plurality of sub-trees; generating a vessel representation based on the pre-navigation image data; acquiring live image data of the object; determining spatial relation of the pre-navigation image data and the live image data; analyzing the live image data by identifying and localizing the element in the live image data; determining a sub-tree in which the element is positioned, where the determining is based on the localization of the element and on the spatial relation; selecting a portion of the vascular structure based on the determined sub-tree; generating a combination of the live image data and an image of the selected portion of the vascular structure; and displaying the combination as a tailored roadmap.
摘要翻译：用于检查对象的自适应路线图设备和方法包括提供表示作为包括感兴趣元素并且具有多个子树的树状结构的血管结构的对象的一部分的导航前图像数据; 基于导航前图像数据生成船舶表示; 获取对象的实时图像数据; 确定所述导航前图像数据和实况图像数据的空间关系; 通过识别和定位实时图像数据中的元素来分析实况图像数据; 确定元素位于其中的子树，其中确定基于元素的定位和空间关系; 基于确定的子树选择血管结构的一部分; 生成活体图像数据和血管结构的所选部分的图像的组合; 并将该组合显示为定制的路线图。

9. 发明申请

US20100014726A1 HIERARCHICAL MOTION ESTIMATION 审中-公开
标题翻译：分层运动估计
公开(公告)号：US20100014726A1
公开(公告)日：2010-01-21
申请号：US12302897
申请日：2007-05-21
申请人： Dirk Schaefer , Andreas Engler , Babak Movassaghi , Volker Rasche , Michael Grass
发明人： Dirk Schaefer , Andreas Engler , Babak Movassaghi , Volker Rasche , Michael Grass
IPC分类号： G06K9/00 , G06K9/36
CPC分类号： A61B6/504 , A61B6/032 , A61B6/4085 , A61B6/481 , A61B6/5288 , A61B6/541 , G06T3/0037 , G06T7/20 , G06T2207/10081 , G06T2207/20016 , G06T2207/30101
摘要： In three-dimensional rotational x-ray coronary imaging problems may arise when estimating the motion of small vessels. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for performing a hierarchical motion estimation by global affine transformation for every heart phase, followed by vessel branch selective affine and non-affine transformations. This may provide for an improved image quality.
摘要翻译：在估计小血管运动时可能出现三维旋转X射线冠状动脉成像问题。根据本发明的示例性实施例，提供了一种检查装置，其适用于通过用于每个心脏相的全局仿射变换执行分层运动估计，随后是血管分支选择仿射和非仿射变换。这可以提供改进的图像质量。

10. 发明申请

US20080205722A1 Method and Apparatus for Automatic 4D Coronary Modeling and Motion Vector Field Estimation 审中-公开
标题翻译：自动4D冠状动脉造影和运动矢量场估计方法与装置
公开(公告)号：US20080205722A1
公开(公告)日：2008-08-28
申请号：US12063682
申请日：2006-08-04
申请人： Dirk Schaefer , Michael Grass , Uwe Jandt
发明人： Dirk Schaefer , Michael Grass , Uwe Jandt
IPC分类号： G06K9/00
CPC分类号： G06T7/11 , G06T2207/10121 , G06T2207/20132 , G06T2207/20156 , G06T2207/30101
摘要： A method for computer-aided four-dimensional (4D) modeling of an anatomical object comprises acquiring a set of three-dimensional (3D) models representing a plurality of static states of the object throughout a cycle. A 4D correspondency estimation is performed on the set of 3D models to determine which points of the 3D models most likely correspond to each other, wherein the 4D correspondency estimation includes one or more of (i) defining a reference phase, (ii) performing vessel-oriented correspondency estimation, and (iii) post-processing of 4D motion data. The method further comprises automatic 3D modeling with a front propagation algorithm.
摘要翻译：用于解剖对象的计算机辅助四维（4D）建模的方法包括在整个循环中获取表示对象的多个静态的一组三维（3D）模型。对所述3D模型集进行4D对应度估计，以确定所述3D模型中哪些点最可能彼此对应，其中所述4D对应度估计包括以下中的一个或多个（i）定义参考相位，（ii）执行血管（iii）4D运动数据的后处理。该方法还包括利用前向传播算法的自动3D建模。

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