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1. 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。

2. 发明申请

US20090238412A1 LOCAL MOTION COMPENSATED RECONSTRUCTION OF STENOSIS 审中-公开
标题翻译：局部运动补偿重建STENOSIS
公开(公告)号：US20090238412A1
公开(公告)日：2009-09-24
申请号：US12305996
申请日：2007-06-18
申请人： Michael Grass , Dirk Schaefer , Babak Movassaghi
发明人： Michael Grass , Dirk Schaefer , Babak Movassaghi
IPC分类号： G06T7/20 , G06T7/00
CPC分类号： A61B6/504 , A61B6/032 , A61B6/469 , A61B6/5264 , A61B6/527 , A61B6/541
摘要： The analysis of a stenosis of a coronary vessel in three dimensions requires a motion compensated reconstruction. According to an exemplary embodiment of the present invention, an examination apparatus for local motion compensated reconstruction data set is provided, wherein the local motion compensated reconstruction vectors relating to a start point and an end point of the stenosis.
摘要翻译：三维冠状动脉血管狭窄的分析需要运动补偿重建。根据本发明的示例性实施例，提供了一种用于局部运动补偿重建数据集的检查装置，其中与狭窄的起始点和终点有关的局部运动补偿重建向量。

3. 发明授权

US08175356B2 Cardiac phase determination 有权
标题翻译：心脏相测定
公开(公告)号：US08175356B2
公开(公告)日：2012-05-08
申请号：US12513370
申请日：2007-10-24
申请人： Babak Movassaghi , Michael Grass , Dirk Schaefer
发明人： Babak Movassaghi , Michael Grass , Dirk Schaefer
IPC分类号： G06K9/00
CPC分类号： A61B6/5217 , A61B6/027 , A61B6/503 , A61B6/504 , A61B6/541 , G06T7/254 , G06T2207/30048
摘要： For the reconstruction of the coronary arteries from rotational coronary angiography data, a crucial point is the selection of the optimal cardiac phase for data reconstruction. According to an exemplary embodiment of the present invention, an automatic approach for deriving optimal reconstruction windows is provided by fully automatically selecting the optimal cardiac phase on the basis of a delayed acquisition protocol where at least one heart phase needs to be acquired in a static projection geometry.
摘要翻译：对于从旋转冠状动脉造影数据重建冠状动脉，关键点是数据重建的最佳心脏相位的选择。根据本发明的示例性实施例，通过基于延迟获取协议完全自动选择最佳心脏相位来提供用于导出最佳重建窗口的自动方法，其中需要在静态投影中获取至少一个心脏相位几何。

4. 发明申请

US20100074485A1 CARDIAC PHASE DETERMINATION 有权
标题翻译：心脏相位测定
公开(公告)号：US20100074485A1
公开(公告)日：2010-03-25
申请号：US12513370
申请日：2007-10-24
申请人： Babak Movassaghi , Michael Grass , Dirk Schaefer
发明人： Babak Movassaghi , Michael Grass , Dirk Schaefer
IPC分类号： G06K9/00
CPC分类号： A61B6/5217 , A61B6/027 , A61B6/503 , A61B6/504 , A61B6/541 , G06T7/254 , G06T2207/30048
摘要： For the reconstruction of the coronary arteries from rotational coronary angiography data, a crucial point is the selection of the optimal cardiac phase for data reconstruction. According to an exemplary embodiment of the present invention, an automatic approach for deriving optimal reconstruction windows is provided by fully automatically selecting the optimal cardiac phase on the basis of a delayed acquisition protocol where at least one heart phase needs to be acquired in a static projection geometry.
摘要翻译：对于从旋转冠状动脉造影数据重建冠状动脉，关键点是数据重建的最佳心脏相位的选择。根据本发明的示例性实施例，通过基于延迟获取协议完全自动选择最佳心脏相位来提供用于导出最佳重建窗口的自动方法，其中需要在静态投影中获取至少一个心脏相位几何。

5. 发明申请

US20050185831A1 Analysis of a multi-dimensional structure 失效
标题翻译：分析多维结构
公开(公告)号：US20050185831A1
公开(公告)日：2005-08-25
申请号：US10516151
申请日：2003-05-21
申请人： Volker Rasche , Babak Movassaghi , Michael Grass
发明人： Volker Rasche , Babak Movassaghi , Michael Grass
IPC分类号： A61B6/02 , A61B6/00 , G06T7/00 , G06T7/60 , G06K9/00
CPC分类号： G06T7/60 , G06T7/593 , G06T2207/30101 , Y10S128/922
摘要： A method is provided for analysis of a multi-dimensional structure which includes a tubular structure from two-dimensional datasets for respective pre-determined projection directions. A pair of corresponding initial projected centre points of the tubular structure is identified in two respective initial and further two-dimensional datasets. Projected edges of the tubular structure in said initial two-dimensional datasets and in said further two-dimensional dataset near the respective projected centre points are identified. A local size of the tubular strucwur is derived at the three-dimensional spatial position of the centre point of the tubular structure from said projected edges and the predetermined projection directions.
摘要翻译：提供了一种用于分析多维结构的方法，其包括用于各个预定投影方向的二维数据集的管状结构。在两个相应的初始和进一步的二维数据集中识别管状结构的一对相应的初始投影中心点。识别所述初始二维数据集中的所述管状结构的投影边缘和在相应的投影中心点附近的所述另外的二维数据集中。在管状结构的中心点从所述投影边缘和预定投影方向的三维空间位置导出管状结构的局部尺寸。

6. 发明授权

US07706589B2 Analysis of a multi-dimensional structure 失效
标题翻译：分析多维结构
公开(公告)号：US07706589B2
公开(公告)日：2010-04-27
申请号：US10516151
申请日：2003-05-21
申请人： Volker Rasche , Babak Movassaghi , Michael Grass
发明人： Volker Rasche , Babak Movassaghi , Michael Grass
IPC分类号： G06K9/00
CPC分类号： G06T7/60 , G06T7/593 , G06T2207/30101 , Y10S128/922
摘要： A method is provided for analysis of a multi-dimensional structure which includes a tubular structure from two-dimensional datasets for respective pre-determined projection directions. A pair of corresponding initial projected centre points of the tubular structure is identified in two respective initial and further two-dimensional datasets. Projected edges of the tubular structure in said initial two-dimensional datasets and in said further two-dimensional dataset near the respective projected centre points are identified. A local size of the tubular structure is derived at the three-dimensional spatial position of the centre point of the tubular structure from said projected edges and the predetermined projection directions.
摘要翻译：提供了一种用于分析多维结构的方法，其包括用于各个预定投影方向的二维数据集的管状结构。在两个相应的初始和进一步的二维数据集中识别管状结构的一对相应的初始投影中心点。识别所述初始二维数据集中的所述管状结构的投影边缘和在相应的投影中心点附近的所述另外的二维数据集中。在管状结构的中心点从所述投影边缘和预定投影方向的三维空间位置导出管状结构的局部尺寸。

7. 发明申请

US20070183640A1 Gated cone-beam computed tomography reconstruction with motion compensation 审中-公开
标题翻译：带运动补偿的门控锥束计算机断层扫描重建
公开(公告)号：US20070183640A1
公开(公告)日：2007-08-09
申请号：US10599140
申请日：2005-03-18
申请人： Robert Manzke , Thomas Koehler , Michael Grass , Babak Movassaghi
发明人： Robert Manzke , Thomas Koehler , Michael Grass , Babak Movassaghi
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/412
摘要： E.g. in cardiac cone-beam CT, the source path is interrupted due to the fact that the projection data is gated. According to the present invention, a method is provided to obtain projection data corresponding to an uninterrupted source trajectory from such a gated data set. For this purpose, a motion compensation is applied. Advantageously, a complete data set may be determined allowing for an approximate or an exact reconstruction method to be applied to the completed data set without interruption of the image generation.
摘要翻译：例如。在心脏锥束CT中，由于投影数据被门控的原因，源路径被中断。根据本发明，提供了一种从这种门控数据集获得对应于不中断的源轨迹的投影数据的方法。为此，应用运动补偿。有利地，可以确定完整数据集，允许将近似或精确重建方法应用于完成的数据集而不中断图像生成。

8. 发明授权

US08045677B2 Shifting an object for complete trajectories in rotational X-ray imaging 有权
标题翻译：在旋转X射线成像中移动物体以获得完整的轨迹
公开(公告)号：US08045677B2
公开(公告)日：2011-10-25
申请号：US12441613
申请日：2007-09-17
申请人： Babak Movassaghi , Robert Manzke , Joel Alberto Garcia
发明人： Babak Movassaghi , Robert Manzke , Joel Alberto Garcia
IPC分类号： G01N23/04 , G01N23/083
CPC分类号： A61B6/0457 , A61B6/04 , A61B6/102 , A61B6/4441 , A61B6/4458 , A61B6/481 , A61B6/504 , A61B6/542 , A61B6/544 , A61B6/583
摘要： It is described a method for acquiring a series of two-dimensional X-ray attenuation data of an object under examination (310) by means of an X-ray imaging apparatus (100) having a rotatable scanning unit (301). In order to increase the angular range of the scanning unit (301), when a region of interest (HOa) located not in the center of the object (310) is examined the object under examination (310) is shifted such that the region of interest is temporarily positioned outside the center of rotation. By coupling the rotational movement of the scanning unit (301) with the translative movement of the object (310) in a synchronized manner a collision between the scanning unit (301) and the object (310) can be effectively avoided. By employing an automated motorized object table (312) a precise pre-determined movement of the object (310) can be achieved during the data acquisition. By using an appropriate phantom based calibration procedure carried out with the same table movements known three-dimensional reconstruction algorithm can be directly applied in order to generate a three-dimensional representation of the region of interest (110a).
摘要翻译：描述了一种通过具有可旋转扫描单元（301）的X射线成像设备（100）获取被检查物体（310）的一系列二维X射线衰减数据的方法。为了增加扫描单元（301）的角度范围，当检查位于物体（310）中心的感兴趣区域（110a）被检查时，检查对象（310）被移动，使得区域兴趣被暂时定位在旋转中心之外。通过将扫描单元（301）的旋转运动与物体（310）的平移运动以同步的方式耦合，可以有效地避免扫描单元（301）和物体（310）之间的碰撞。通过采用自动电动对象表（312），可以在数据采集期间实现物体（310）的精确的预定移动。通过使用用相同的表移动执行的适当的基于幻影的校准程序，可以直接应用已知的三维重建算法，以便产生感兴趣区域（110a）的三维表示。

9. 发明授权

US08098919B2 Three-dimensional reconstruction of an object from projection photographs 有权
标题翻译：投影照片对象的三维重建
公开(公告)号：US08098919B2
公开(公告)日：2012-01-17
申请号：US10595875
申请日：2004-11-16
申请人： Volker Rasche , Babak Movassaghi
发明人： Volker Rasche , Babak Movassaghi
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T7/70 , G06T2211/412
摘要： A method for the three-dimensional reconstruction of an object, or its surroundings, in a moving body volume of a patient includes obtaining a series of X-ray projection photographs produced from different directions, with a relevant ECG phase or respiration being recorded simultaneously. Projection photographs of the moving body volume are transformed such that the images of feature points that are located on the projection photographs respectively come to rest at a place on which randomly set spatial reference positions for the feature points are projected. With the projection photographs aligned onto the reference positions, three-dimensional reconstruction of the object can subsequently take place.
摘要翻译：用于在患者的移动体体积中对象或其周围的三维重建的方法包括获得从不同方向产生的一系列X射线投影照片，同时记录相关ECG阶段或呼吸。变换运动体积的投影照片，使得位于投影照片上的特征点的图像分别在特征点的随机设置的空间参考位置被投影的地方休息。随着投影照片对准到参考位置，随后可以进行物体的三维重建。

10. 发明申请

US20100027742A1 SHIFTING AN OBJECT FOR COMPLETE TRAJECTORIES IN ROTATIONAL X-RAY IMAGING 有权
标题翻译：在旋转X射线成像中移动完整轨道的对象
公开(公告)号：US20100027742A1
公开(公告)日：2010-02-04
申请号：US12441613
申请日：2007-09-17
申请人： Babak Movassaghi , Robert Manzke , Joel Alberto Garcia
发明人： Babak Movassaghi , Robert Manzke , Joel Alberto Garcia
IPC分类号： G01N23/04 , A61B6/04 , H05G1/02
CPC分类号： A61B6/0457 , A61B6/04 , A61B6/102 , A61B6/4441 , A61B6/4458 , A61B6/481 , A61B6/504 , A61B6/542 , A61B6/544 , A61B6/583
摘要： It is described a method for acquiring a series of two-dimensional X-ray attenuation data of an object under examination (310) by means of an X-ray imaging apparatus (100) having a rotatable scanning unit (301). In order to increase the angular range of the scanning unit (301), when a region of interest (HOa) located not in the center of the object (310) is examined the object under examination (310) is shifted such that the region of interest is temporarily positioned outside the center of rotation. By coupling the rotational movement of the scanning unit (301) with the translative movement of the object (310) in a synchronized manner a collision between the scanning unit (301) and the object (310) can be effectively avoided. By employing an automated motorized object table (312) a precise pre-determined movement of the object (310) can be achieved during the data acquisition. By using an appropriate phantom based calibration procedure carried out with the same table movements known three-dimensional reconstruction algorithm can be directly applied in order to generate a three-dimensional representation of the region of interest (110a).
摘要翻译：描述了一种通过具有可旋转扫描单元（301）的X射线成像设备（100）获取被检查物体（310）的一系列二维X射线衰减数据的方法。为了增加扫描单元（301）的角度范围，当检查位于物体（310）中心的感兴趣区域（110a）被检查时，检查对象（310）被移动，使得区域兴趣被暂时定位在旋转中心之外。通过将扫描单元（301）的旋转运动与物体（310）的平移运动以同步的方式耦合，可以有效地避免扫描单元（301）和物体（310）之间的碰撞。通过采用自动电动对象表（312），可以在数据采集期间实现物体（310）的精确的预定移动。通过使用用相同的表移动执行的适当的基于幻影的校准程序，可以直接应用已知的三维重建算法，以便产生感兴趣区域（110a）的三维表示。

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