公开(公告)号：US07646900B2

公开(公告)日：2010-01-12

申请号：US10567221

申请日：2004-08-09

申请人： Babak Movassaghi ,  Volker Rasche

发明人： Babak Movassaghi ,  Volker Rasche

IPC分类号： G06K9/00

CPC分类号： G06K9/20 ,  G06K2009/00932 ,  G06K2209/05 ,  G06T7/55 ,  G06T2207/30101

摘要： The invention relates to a method for the reconstruction of a three-dimensional model of a vascular tree from two-dimensional X-ray projection images (A, B, C) that are taken from different spatial directions. On a first projection image (A) at least one reference point (CA) is specified. The gray-value profiles along the epipolar lines (EB, EC) for said reference point (CA) in other projection images (B, C) are then projected on the projection line (L) of the reference point (CA) and added there punctiformly to form a sum profile (S). The sum profile (S) has an extreme, for example, a gray-value minimum, at the position of the space point (C3D) belonging to the reference point (CA). In this way, it is possible to reconstruct semiautomatically a vascular tree from X-ray projections.

摘要翻译： 本发明涉及从不同空间方向拍摄的二维X射线投影图像（A，B，C）重建血管树的三维模型的方法。 在第一投影图像（A）上指定至少一个参考点（CA）。 然后将其他投影图像（B，C）中的所述参考点（CA）的沿着对极线（EB，EC）的灰度值分布投影到参考点（CA）的投影线（L）上并在其中添加 以形成一个总和分布（S）。 在属于参考点（CA）的空间点（C3D）的位置处，总和曲线（S）具有极端，例如灰度值最小值。 以这种方式，可以从X射线投影半自动重建血管树。

公开(公告)号：US07426256B2

公开(公告)日：2008-09-16

申请号：US10549267

申请日：2004-03-12

申请人： Volker Rasche ,  Babak Movassaghi ,  Marcel Boosten

发明人： Volker Rasche ,  Babak Movassaghi ,  Marcel Boosten

IPC分类号： A61B6/03

CPC分类号： A61B6/5264 ,  A61B6/00 ,  A61B6/503 ,  A61B6/508 ,  A61B6/541 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/005 ,  G06T2211/404 ,  G06T2211/412

摘要： An X-ray imaging method forms a set of a plurality of two-dimensional X-Ray projection images of a medical or veterinary object to be examined through a scanning rotation by an X-Ray source viz à viz the object. Such X-Ray images are acquired at respective predetermined time instants with respect to a functionality process produced by the object. From said set of X-Ray projection images by back-projection a three-dimensional volume image of the object is reconstructed. In particular, an appropriate motion correction is derived for the respective two-dimensional images, and subsequently as based on a motion vector field from the various corrected two-dimensional images the intended three-dimensional volume is reconstructed.

摘要翻译： X射线成像方法通过由X射线源进行扫描旋转来形成待检查的医疗或兽医物体的多个二维X射线投影图像的集合，即X射线源。 相对于由对象产生的功能处理，在相应的预定时刻获取这样的X射线图像。 通过反投影从所述X射线投影图像组中重构对象的三维体积图像。 具体地，针对相应的二维图像导出适当的运动校正，并且随后基于来自各种校正的二维图像的运动矢量场来重构预期的三维体积。

公开(公告)号：US20070263916A1

公开(公告)日：2007-11-15

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 ,  G06K9/36

CPC分类号： G06T11/005 ,  G06T7/70 ,  G06T2211/412

摘要： The invention relates to a method for the three-dimensional reconstruction of an object such as for example a stent (5) in the coronary vessels of a patient. In the course of this, a series of X-ray projection photographs (A,) are produced from different directions, with the relevant ECG phase (E,) being recorded simultaneously. On the projection photographs (A,), the position of feature points (R, Q) is segmented (a). The photographs (A,) are furthermore allocated (b) into classes (Kp) according to their belonging to different sections (Epcl) of the heartbeat phase. For each of these classes, the corresponding spatial position ((x,y,z)Qp) of the feature points is established (e). In the next step (d), from the positions of the feature points (R, Q) that are now known for various heartbeat phases, the displacement vectors (SRp-m, SQp-m) or generally the transformations (Epm) are calculated which link (d) the positions of the feature points for different heartbeat phases (p, m). With the aid of these transformations, in a last step (e) a three-dimensional reconstruction can then be carried out for the whole stent (5) or its surroundings, by referring back to all the X-ray projection photographs from different heartbeat phases (p1, p2). In an alternative embodiment of the invention, projection photographs of a moving body volume are transformed such that the images of feature points that are located on the 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 that are thus aligned onto the reference positions, three-dimensional reconstruction of the object can subsequently take place.

公开(公告)号：US20060210019A1

公开(公告)日：2006-09-21

申请号：US10549267

申请日：2004-03-12

申请人： Volker Rasche ,  Babak Movassaghi ,  Marcel Boosten

发明人： Volker Rasche ,  Babak Movassaghi ,  Marcel Boosten

IPC分类号： G01N23/04 ,  A61B5/05

CPC分类号： A61B6/5264 ,  A61B6/00 ,  A61B6/503 ,  A61B6/508 ,  A61B6/541 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/005 ,  G06T2211/404 ,  G06T2211/412

摘要： An X-ray imaging method forms a set of a plurality of two-dimensional X-Ray projection images of a medical or veterinary object to be examined through a scanning rotation by an X-Ray source viz à viz the object. Such X-Ray images are acquired at respective predetermined time instants with respect to a functionality process produced by the object. From said set of X-Ray projection images by back-projection a three-dimensional volume image of the object is reconstructed. In particular, an appropriate motion correction is derived for the respective two-dimensional images, and subsequently as based on a motion vector field from the various corrected two-dimensional images the intended three-dimensional volume is reconstructed.

摘要翻译： X射线成像方法通过由X射线源进行扫描旋转来形成待检查的医疗或兽医物体的多个二维X射线投影图像的集合，即X射线源。 相对于由对象产生的功能处理，在相应的预定时刻获取这样的X射线图像。 通过反投影从所述X射线投影图像组中重构对象的三维体积图像。 具体地，针对相应的二维图像导出适当的运动校正，并且随后基于来自各种校正的二维图像的运动矢量场来重构预期的三维体积。