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    Method for acquiring a 3D image dataset freed of traces of a metal object
    2.
    发明授权
    Method for acquiring a 3D image dataset freed of traces of a metal object 有权
    用于获取没有金属物体痕迹的3D图像数据集的方法

    公开(公告)号：US08768045B2

    公开(公告)日：2014-07-01

    申请号：US13420706

    申请日：2012-03-15

    申请人： Christopher Rohkohl ,  Bernhard Scholz

    发明人： Christopher Rohkohl ,  Bernhard Scholz

    IPC分类号： G06K9/00

    CPC分类号： G06T19/00 ,  A61B6/03 ,  A61B6/12 ,  A61B6/5258 ,  G06T7/11 ,  G06T11/005 ,  G06T2210/41 ,  G06T2211/424

    摘要： An interpolation of data values is performed during the acquisition of a 3D image dataset which is free of traces of a metal object imaged in the underlying 2D image datasets. A target function is defined into which data values of the 3D image dataset that are dependent on said substitute data values are incorporated following preprocessing. The substitute data values are then varied iteratively until the value of the target function satisfies a predetermined criterion. Residual artifacts that still persist following the interpolation can thus be effectively reduced.

    摘要翻译： 在获取3D图像数据集的过程中执行数据值的内插，该3D图像数据集没有在下面的2D图像数据集中成像的金属物体的痕迹。 定义目标函数，其中在预处理之后并入依赖于所述替代数据值的3D图像数据集的数据值。 然后，替代数据值被迭代地改变，直到目标函数的值满足预定标准。 因此，可以有效地减少在插补之后仍然存在的残余伪影。

    Method for acquiring a 3D image dataset freed of traces of a metal object
    4.
    发明申请
    Method for acquiring a 3D image dataset freed of traces of a metal object 有权
    用于获取没有金属物体痕迹的3D图像数据集的方法

    公开(公告)号：US20120237115A1

    公开(公告)日：2012-09-20

    申请号：US13420706

    申请日：2012-03-15

    申请人： Christopher Rohkohl ,  Bernhard Scholz

    发明人： Christopher Rohkohl ,  Bernhard Scholz

    IPC分类号： G06K9/00

    CPC分类号： G06T19/00 ,  A61B6/03 ,  A61B6/12 ,  A61B6/5258 ,  G06T7/11 ,  G06T11/005 ,  G06T2210/41 ,  G06T2211/424

    摘要： An interpolation of data values is performed during the acquisition of a 3D image dataset which is free of traces of a metal object imaged in the underlying 2D image datasets. A target function is defined into which data values of the 3D image dataset that are dependent on said substitute data values are incorporated following preprocessing. The substitute data values are then varied iteratively until the value of the target function satisfies a predetermined criterion. Residual artifacts that still persist following the interpolation can thus be effectively reduced.

    摘要翻译： 在获取3D图像数据集的过程中执行数据值的内插，该3D图像数据集没有在下面的2D图像数据集中成像的金属物体的痕迹。 定义目标函数，其中在预处理之后并入依赖于所述替代数据值的3D图像数据集的数据值。 然后，替代数据值被迭代地改变，直到目标函数的值满足预定标准。 因此，可以有效地减少在插补之后仍然存在的残余伪影。

    IMAGE PROCESSING OF FOUR-DIMENSIONAL ANGIOGRAPHY DATA SET
    5.
    发明申请
    IMAGE PROCESSING OF FOUR-DIMENSIONAL ANGIOGRAPHY DATA SET 审中-公开

    公开(公告)号：US20180218521A1

    公开(公告)日：2018-08-02

    申请号：US15874998

    申请日：2018-01-19

    申请人： Markus Kowarschik ,  Sonja Gehrisch ,  Christopher Rohkohl

    发明人： Markus Kowarschik ,  Sonja Gehrisch ,  Christopher Rohkohl

    IPC分类号： G06T11/20 ,  A61B6/00

    CPC分类号： G06T11/206 ,  A61B6/465 ,  A61B6/481 ,  A61B6/504 ,  G06T11/008 ,  G06T2200/24 ,  G06T2210/41 ,  G06T2211/404

    摘要： A method is provided for image processing an angiography data set of a capture region of interest of a patient's vascular system. The method includes establishing a static time parameter set from the angiography data set, wherein the static time parameter set includes time parameters and characterizes the time profile of the contrast agent concentration for picture elements of the capture region described in the image data subsets; establishing a series of mask data sets by picture element-by-picture element application of a window function having a window width of greater than zero; selecting a subinterval in the parameter space covered by the time parameters for each instant of the series to the static time parameter set; and establishing a series of static display data sets by applying the mask data sets to a static vessel data set, which shows a vascular system perfused by the contrast agent in the capture region and which underlies or is derived from the angiography data set.

    3D X-ray imaging of coronary vessels with ECG gating and motion correction
    6.
    发明授权
    3D X-ray imaging of coronary vessels with ECG gating and motion correction 有权
    冠脉血管的3D X线成像与ECG门控和运动校正

    公开(公告)号：US09013471B2

    公开(公告)日：2015-04-21

    申请号：US13152367

    申请日：2011-06-03

    申请人： Günter Lauritsch ,  Christopher Rohkohl

    发明人： Günter Lauritsch ,  Christopher Rohkohl

    IPC分类号： G06T15/00 ,  A61B6/00 ,  G06T11/00

    CPC分类号： A61B6/504 ,  A61B6/4441 ,  A61B6/4458 ,  A61B6/5264 ,  A61B6/5288 ,  A61B6/541 ,  G06T11/005 ,  G06T2211/412 ,  G06T2211/424

    摘要： A method for three-dimensional visualization of a moving structure by a rotation angiography method is described. A series of projection images is recorded by an image acquisition unit from different recording angles during a rotation cycle. A three-dimensional image data can be reconstructed from the projection images. A continuous rotation cycle is proposed to be performed with simultaneous recording of at least one ECG. A three-dimensional reconstructed reference image is generated through a first correction of the motion of the moving structure by affine transformations. A three-dimensional image data of the moving structure is reconstructed from the data acquired in the continuous rotation cycle when using the reconstructed reference image while performing an estimation and correction of the motion by elastic deformations.

    摘要翻译： 描述了通过旋转血管造影方法对运动结构进行三维可视化的方法。 在旋转周期期间，图像采集单元从不同的记录角度记录一系列投影图像。 可以从投影图像重建三维图像数据。 提出连续旋转周期，同时记录至少一个ECG。 通过仿射变换对运动结构的运动进行第一次校正来生成三维重建参考图像。 当通过弹性变形执行运动的估计和校正时，在使用重建的参考图像时，从连续旋转周期中获取的数据重构运动结构的三维图像数据。

    METHOD FOR GENERATING A FOUR-DIMENSIONAL REPRESENTATION OF A TARGET REGION OF A BODY, WHICH TARGET REGION IS SUBJECT TO PERIODIC MOTION
    9.
    发明申请
    METHOD FOR GENERATING A FOUR-DIMENSIONAL REPRESENTATION OF A TARGET REGION OF A BODY, WHICH TARGET REGION IS SUBJECT TO PERIODIC MOTION 有权
    用于产生目标区域的四维区域的四维表示的方法，其目标区域受定期运动的影响

    公开(公告)号：US20120280978A1

    公开(公告)日：2012-11-08

    申请号：US13314445

    申请日：2011-12-08

    申请人： Wolfgang Holub ,  Gunter Lauritsch ,  Christopher Rohkohl

    发明人： Wolfgang Holub ,  Gunter Lauritsch ,  Christopher Rohkohl

    IPC分类号： G06T15/00 ,  G06T13/00

    CPC分类号： G06T13/20 ,  A61B5/0044 ,  A61B5/0402 ,  A61B5/1107 ,  A61B5/1128 ,  A61B5/7289 ,  G06T11/005 ,  G06T2210/41 ,  G06T2211/412

    摘要： A method for generating a four-dimensional representation of a periodically moving target region is proposed. A motion-compensated three-dimensional image dataset is determined from two-dimensional projection images recorded from different projection directions. Estimation parameters that describe a non-periodic motion and are derived from a motion model formulated independently of the phase of the periodic motion with respect to the recording instants of the projection images are determined from the projection images, such that the three-dimensional image dataset represents a static reconstruction based on all projection images for a specific instant. The three-dimensional image dataset is animated from the estimation parameters used in its reconstruction. The motion information that is missing in the estimation parameters due to the two-dimensionality of the projection images is additionally determined using a boundary condition that describes the periodicity of the motion, and used for the animation.

    摘要翻译： 提出了一种用于产生周期性移动目标区域的四维表示的方法。 从不同投影方向记录的二维投影图像确定运动补偿三维图像数据集。 从投影图像确定描述非周期性运动并且从与投影图像的记录时刻独立于周期性运动的相位配置的运动模型导出的估计参数，使得三维图像数据集 表示基于特定时刻的所有投影图像的静态重建。 三维图像数据集是从其重建中使用的估计参数进行动画化的。 使用描述运动的周期性并用于动画的边界条件另外确定由于投影图像的二维性而在估计参数中丢失的运动信息。