-
1.发明授权Optimal rotational trajectory determination for RA based on pre-determined optimal view map 有权基于预先确定的最优视图的RA的最优旋转轨迹确定公开(公告)号：US08463014B2
公开(公告)日：2013-06-11
申请号：US12305989
申请日：2007-06-18
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。
-
2.发明授权公开(公告)号：US08045677B2
公开(公告)日：2011-10-25
申请号：US12441613
申请日：2007-09-17
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。
-
3.发明申请公开(公告)号：US20100027742A1
公开(公告)日：2010-02-04
申请号：US12441613
申请日：2007-09-17
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。
-
-
搜索结果
3 条记录 (耗时 0.02 秒)