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。

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。

公开(公告)号：US08463014B2

公开(公告)日：2013-06-11

申请号：US12305989

申请日：2007-06-18

申请人： Babak Movassaghi ,  Onno Wink ,  Shiuh-Yung James Chen ,  Joel Alberto Garcia ,  John D. Carroll

发明人： Babak Movassaghi ,  Onno Wink ,  Shiuh-Yung James Chen ,  Joel Alberto Garcia ,  John D. Carroll

IPC分类号： G06K9/00

CPC分类号： A61B6/4441 ,  A61B6/027 ,  A61B6/469 ,  A61B6/481 ,  A61B6/504

摘要： A method for determining an optimal trajectory for 3-dimensional rotational X-ray coronary angiography for a C-arm X-ray system that has at least two degrees of freedom, where the C-arm X-ray system is defined by a rotational movement of the C-arm expressed in a left/right coronary artery oblique angle, and a roll motion of the C-arm expressed in a caudal/cranial angle. The method includes generating of a 3-dimensional representation of a center-line of a body vessel in a region of interest. generating at least one optimal view map. Further, an optimal trajectory for the X-ray system within the optimal view map is determined, where an optimal trajectory is at least determined by movements of the C-arm within its two degrees of freedom allowing image projections with minimal foreshortening and/or overlap while minimizing an exposure to X-rays.

摘要翻译： 用于确定具有至少两个自由度的C臂X射线系统的三维旋转X射线冠状动脉造影的最佳轨迹的方法，其中C臂X射线系统由旋转运动限定 以左/右冠状动脉倾斜角度表示的C型臂，以及以尾部/颅角表示的C型臂的滚动运动。 该方法包括产生感兴趣区域中的身体血管的中心线的三维表示。 生成至少一个最佳视图。 此外，确定最佳视图中的X射线系统的最佳轨迹，其中最佳轨迹至少由C臂在其两个自由度内的移动决定，允许具有最小缩短和/或重叠的图像投影 同时最小化X射线的暴露。

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。

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。

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。

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。

公开(公告)号：US07574026B2

公开(公告)日：2009-08-11

申请号：US10545184

申请日：2004-01-23

申请人： Volker Rasche ,  Babak Movassaghi

发明人： Volker Rasche ,  Babak Movassaghi

IPC分类号： G06K9/00

CPC分类号： G06T11/008 ,  G06T17/10 ,  G06T2211/404 ,  G06T2211/412

摘要： The invention provides a method for 3D modeling of a three-dimensional tubular structure of an examination object from 2D projection images (D) of the structure taken from different projection directions. The method has the following steps: reconstruction of a 3D image from the 2D projection images (D); selection of at least one 3D central line point (MO) in the 3D image, said 3D central line point being located in the structure; segmentation of 3D central line points (M) of the structure in the 3D image; forward projection of the 3D central line points (M), which have been segmented in the 3D image, into 2D projection images (D′); determination of border points of the structure in the 2D projection images (D′) on the basis of 3D central line points (Z) that have been projected in; and back-projection of the border points from the 2D projection image (D′) into the 3D image.

摘要翻译： 本发明提供一种用于从取自不同投影方向的结构的2D投影图像（D）对检查对象的三维管状结构进行3D建模的方法。 该方法具有以下步骤：从2D投影图像（D）重建3D图像; 选择所述3D图像中的至少一个3D中心线点（MO），所述3D中心线点位于所述结构中; 分割3D图像中三维中心线（M）的结构; 已经在3D图像中分割的3D中心线点（M）的向前投影成2D投影图像（D'）; 根据已经投影的3D中心线点（Z）确定2D投影图像（D'）中的结构的边界点; 并将边界点从2D投影图像（D'）反投影到3D图像中。

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：US20100014740A1

公开(公告)日：2010-01-21

申请号：US12305989

申请日：2007-06-18

申请人： Babak Movassaghi ,  Onno Wink ,  Shuh-Yung Chen ,  Joel A. Garcia ,  John D. Carroll

发明人： Babak Movassaghi ,  Onno Wink ,  Shuh-Yung Chen ,  Joel A. Garcia ,  John D. Carroll

IPC分类号： G06K9/46 ,  G06T7/00

CPC分类号： A61B6/4441 ,  A61B6/027 ,  A61B6/469 ,  A61B6/481 ,  A61B6/504

摘要： It is described a method for determining an optimal trajectory (25) for 3-dimensional rotational X-ray coronary angiography for a C-arm X-ray system. The C-arm X-ray system has at least two degrees of freedom. They are defined by a rotational movement of the C-arm (11) expressed in a left/right coronary artery oblique angle, and a roll motion of the C-arm (11) expressed in a caudal/cranial angle. The method performs the following steps in a sequence. Firstly, a generation of a 3-dimensional representation of a centre-line of a body vessel in a region of interest is performed. Secondly, at least one optimal view map is generated. Finally, an optimal trajectory (25) for the X-ray system within the optimal view map is determined, wherein an optimal trajectory (25) is at least determined by movements of the C-arm within its two degrees of freedom allowing image projections with minimal foreshortening and/or overlap while minimizing an exposure to X-rays.

摘要翻译： 描述了一种用于确定用于C臂X射线系统的三维旋转X射线冠状动脉造影的最佳轨迹（25）的方法。 C臂X射线系统具有至少两个自由度。 它们由以左/右冠状动脉斜角表示的C形臂（11）的旋转运动和以尾部/头角表示的C形臂（11）的滚动运动限定。 该方法按顺序执行以下步骤。 首先，执行感兴趣区域中的体血管的中心线的三维表示的生成。 其次，生成至少一个最佳视图。 最后，确定在最佳视图内的X射线系统的最佳轨迹（25），其中最佳轨迹（25）至少由C臂在其两个自由度内的移动决定，允许具有 最小的缩短和/或重叠，同时最小化X射线的暴露。