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    METHOD FOR THE REDUCTION OF ARTIFACTS IN IMAGE DATA SETS AND COMPUTING FACILITY
    2.
    发明申请
    METHOD FOR THE REDUCTION OF ARTIFACTS IN IMAGE DATA SETS AND COMPUTING FACILITY 有权
    用于减少图像数据集和计算设备中的人造物的方法

    公开(公告)号：US20150030228A1

    公开(公告)日：2015-01-29

    申请号：US14010928

    申请日：2013-08-27

    申请人： Christoph Köhler ,  Bernd Schreiber

    发明人： Christoph Köhler ,  Bernd Schreiber

    IPC分类号： G06T7/00

    CPC分类号： G06T7/0012 ,  G06T5/002 ,  G06T5/50 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/20182 ,  G06T2207/30016

    摘要： A method for the reduction of artifacts based on an unequal representation of the same material classes in various locations, in particular of cupping artifacts, in a three-dimensional image data set, reconstructed from two-dimensional x-ray projection images is provided. An image datum, describing an attenuation value, is allocated respectively to a voxel, wherein at least two material class regions are located in a post-processing step, which receive, in particular, image data, which is homogeneously distributed and lies in an expected material class interval of the attenuation values, and, considering at least one characteristic of the material class regions, calculates a smooth homogenization function, which is to be applied to the image data of the entire image data set and is applied to the image data of the image data set.

    摘要翻译： 提供了一种基于从二维x射线投影图像重建的三维图像数据集中的各种位置中特别是拔罐伪像的相同材料类别的不平等表示来减少伪像的方法。 描述衰减值的图像数据分别被分配给体素，其中至少两个材料类区域位于后处理步骤中，后处理步骤特别地接收图像数据，该图像数据被均匀分布并位于预期的 衰减值的材料等级间隔，并且考虑材料等级区域的至少一个特性，计算要应用于整个图像数据集的图像数据的平滑均匀化函数，并应用于图像数据的图像数据 图像数据集。

    Method for the reduction of artifacts in image data sets and computing facility
    3.
    发明授权
    Method for the reduction of artifacts in image data sets and computing facility 有权
    用于减少图像数据集和计算设备中的伪像的方法

    公开(公告)号：US09224201B2

    公开(公告)日：2015-12-29

    申请号：US14010928

    申请日：2013-08-27

    申请人： Christoph Köhler ,  Bernd Schreiber

    发明人： Christoph Köhler ,  Bernd Schreiber

    IPC分类号： G06K9/00 ,  G06T7/00 ,  G06T5/00 ,  G06T5/50 ,  G06T11/00

    CPC分类号： G06T7/0012 ,  G06T5/002 ,  G06T5/50 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/20182 ,  G06T2207/30016

    摘要： A method for the reduction of artifacts based on an unequal representation of the same material classes in various locations, in particular of cupping artifacts, in a three-dimensional image data set, reconstructed from two-dimensional x-ray projection images is provided. An image datum, describing an attenuation value, is allocated respectively to a voxel, wherein at least two material class regions are located in a post-processing step, which receive, in particular, image data, which is homogeneously distributed and lies in an expected material class interval of the attenuation values, and, considering at least one characteristic of the material class regions, calculates a smooth homogenization function, which is to be applied to the image data of the entire image data set and is applied to the image data of the image data set.

    摘要翻译： 提供了一种基于从二维x射线投影图像重建的三维图像数据集中的各种位置中特别是拔罐伪像的相同材料类别的不平等表示来减少伪像的方法。 描述衰减值的图像数据分别被分配给体素，其中至少两个材料类区域位于后处理步骤中，后处理步骤特别地接收图像数据，该图像数据被均匀分布并位于预期的 衰减值的材料等级间隔，并且考虑材料等级区域的至少一个特性，计算要应用于整个图像数据集的图像数据的平滑均匀化函数，并应用于图像数据的图像数据 图像数据集。

    Method for evaluating an image dataset acquired by a radiation-based image acquisition device
    4.
    发明授权
    Method for evaluating an image dataset acquired by a radiation-based image acquisition device 有权
    用于评估由基于辐射的图像获取装置获取的图像数据集的方法

    公开(公告)号：US08039804B2

    公开(公告)日：2011-10-18

    申请号：US12381494

    申请日：2009-03-12

    申请人： Thomas Brunner ,  Christoph Köhler ,  Bernd Schreiber

    发明人： Thomas Brunner ,  Christoph Köhler ,  Bernd Schreiber

    IPC分类号： G01T1/20 ,  G01N23/00

    CPC分类号： G06T11/005

    摘要： The invention relates to a method for evaluating an image dataset obtained by a radiation-based image acquisition device. A scatter background dataset is determined as a function of the image data. The image dataset is corrected pixel by pixel by multiplying the image dataset with the inverse of a function dependent on the quotient of the scatter background data and the image data at a respective pixel. The function is a nonlinear, smooth function determined by a coefficient and having positive derivatives. The absolute value of the function is one for the value zero. The image acquisition parameter dependent coefficient is determined by an optimization process.

    摘要翻译： 本发明涉及一种用于评估由基于辐射的图像获取装置获得的图像数据集的方法。 散射背景数据集被确定为图像数据的函数。 通过将图像数据集与取决于散射背景数据的商和相应像素处的图像数据的函数的倒数相乘来对图像数据集进行逐像素校正。 该函数是由系数确定并具有正导数的非线性，平滑函数。 该函数的绝对值为零值。 图像采集参数依赖系数由优化过程决定。

    Analysis of radiographic images
    7.
    发明授权
    Analysis of radiographic images 有权
    射线照相分析

    公开(公告)号：US06333991B1

    公开(公告)日：2001-12-25

    申请号：US09190311

    申请日：1998-11-12

    申请人： Bernd Schreiber ,  Frank Kreuder

    发明人： Bernd Schreiber ,  Frank Kreuder

    IPC分类号： G06K900

    CPC分类号： G06T5/50 ,  A61N5/10

    摘要： Two analysis methods for a portal image are disclosed, one to check apparatus setup and the other to check patient positioning. The first involves preparing a reference radiation field image and a sample radiation field image from a reference image and a sample image respectively by, in order, (i) defining a threshold value and (ii) setting pixels within the respective images to a dark or a bright state if darker or brighter than the threshold value, (optionally) comparing the reference radiation field image and the sample radiation field image to determine at least one of their relative rotation, translation and scaling, subtracting one of the radiation field images from the other thereby to obtain a difference image, and inspecting the difference image to ascertain changes in the radiation field between preparation of the reference image and the sample image. The second comprising the steps of filtering at least the sample image to remove low frequency variations, selecting a region of interest (ROI) within the reference and sample images, correlating the ROI of the reference image with the ROI of the sample image, and determining the relative displacements of the reference image and the sample image.

    摘要翻译： 公开了门式图像的两种分析方法，一种用于检查装置设置，另一种用于检查患者定位。 首先涉及通过以下步骤从参考图像和样本图像分别准备参考辐射场图像和样本辐射场图像：（i）定义阈值，以及（ii）将各个图像内的像素设置为暗或 如果比阈值更暗或更亮，则明亮状态（可选地）比较参考辐射场图像和样本辐射场图像以确定其相对旋转，平移和缩放中的至少一个，从其中减去一个辐射场图像 从而获得差分图像，并且检查差分图像以确定准备参考图像和样本图像之间的辐射场的变化。 第二个步骤包括以下步骤：至少过滤样本图像以去除低频变化，选择参考和样本图像内的感兴趣区域（ROI），将参考图像的ROI与样本图像的ROI相关联，以及确定 参考图像和样本图像的相对位移。

    Method for determining a three-dimensional image dataset by an X-ray device
    8.
    发明授权
    Method for determining a three-dimensional image dataset by an X-ray device 有权

    公开(公告)号：US10357208B2

    公开(公告)日：2019-07-23

    申请号：US15726565

    申请日：2017-10-06

    申请人： Thomas Brunner ,  Bernd Schreiber

    发明人： Thomas Brunner ,  Bernd Schreiber

    IPC分类号： G06K9/00 ,  A61B5/00 ,  A61B6/00 ,  G06F19/00 ,  G06T11/00 ,  A61B6/03

    摘要： A method for determining a three-dimensional image dataset by an X-ray device is disclosed herein. The method includes recording projection images of an examination object from a plurality of recording angles, and reconstructing the image dataset from the projection images, wherein, for at least one examined projection image, in each case an interference condition is evaluated the fulfillment of which is dependent upon at least parts of the image data of the (respective) examined projection image and/or upon at least one parameter of the radiation source during the recording of the (respective) examined projection image and indicates that the (respective) examined projection image is a projection image with interference during the recording of which arcing has occurred in the radiation source. The method also includes disregarding at least one projection image with interference, or giving the projection image a lower weighting than all the projection images with no interference, or replacing the projection image with a synthetic projection image.

    METHOD FOR DETERMINING A THREE-DIMENSIONAL IMAGE DATASET BY AN X-RAY DEVICE
    9.
    发明申请
    METHOD FOR DETERMINING A THREE-DIMENSIONAL IMAGE DATASET BY AN X-RAY DEVICE 审中-公开

    公开(公告)号：US20180098740A1

    公开(公告)日：2018-04-12

    申请号：US15726565

    申请日：2017-10-06

    申请人： Thomas Brunner ,  Bernd Schreiber

    发明人： Thomas Brunner ,  Bernd Schreiber

    IPC分类号： A61B5/00 ,  A61B6/00 ,  G06F19/00 ,  G06T11/00

    CPC分类号： A61B5/7425 ,  A61B5/0062 ,  A61B6/03 ,  A61B6/4441 ,  A61B6/501 ,  A61B6/52 ,  A61B6/5205 ,  A61B6/5264 ,  G06F19/321 ,  G06T11/003 ,  G06T11/005 ,  G16H30/20

    摘要： A method for determining a three-dimensional image dataset by an X-ray device is disclosed herein. The method includes recording projection images of an examination object from a plurality of recording angles, and reconstructing the image dataset from the projection images, wherein, for at least one examined projection image, in each case an interference condition is evaluated the fulfillment of which is dependent upon at least parts of the image data of the (respective) examined projection image and/or upon at least one parameter of the radiation source during the recording of the (respective) examined projection image and indicates that the (respective) examined projection image is a projection image with interference during the recording of which arcing has occurred in the radiation source. The method also includes disregarding at least one projection image with interference, or giving the projection image a lower weighting than all the projection images with no interference, or replacing the projection image with a synthetic projection image.

    Method for 3-D data collection with a biplane C-arm system with biplane acquisition multiplexing
    10.
    发明授权
    Method for 3-D data collection with a biplane C-arm system with biplane acquisition multiplexing 有权
    具有双平面采集复用的双平面C臂系统的3D数据采集方法

    公开(公告)号：US08538505B2

    公开(公告)日：2013-09-17

    申请号：US12855758

    申请日：2010-08-13

    申请人： Thomas Brunner ,  Sebastian Graf ,  Bernd Schreiber

    发明人： Thomas Brunner ,  Sebastian Graf ,  Bernd Schreiber

    IPC分类号： A61B5/055 ,  A61B6/03

    CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4441 ,  A61B6/4458 ,  A61B6/4464 ,  A61B6/503 ,  A61B6/541

    摘要： A method for collecting three-dimensional data of an object from a series of projection images recorded by a biplane C-arm system is provided. A cardiac activity is recorded. The cardiac frequency and a start cardiac phase are determined for calculating parameters of the C-arm planes. The C-arm planes are set with the parameters and data is acquired in the start cardiac phase. The C-arm planes are uniformly rotated at a same speed in a forward motion over an angular area and record data at different angular areas at different cardiac phases. Data is acquired in the start cardiac phase after termination of the forward motion. The C-arm planes are uniformly rotated at a same speed in a backward motion over an angular area and records data at different angular areas at different cardiac phases. The captured data are reconstructed after termination of the backward motion upon completed acquisition.

    摘要翻译： 提供了从由双平面C臂系统记录的一系列投影图像中收集对象的三维数据的方法。 记录心脏活动。 确定心脏频率和开始心脏相位以计算C臂平面的参数。 C臂平面设置参数，并在起始心脏阶段获取数据。 C形臂平面以相同的速度在角度区域上的向前运动中均匀地旋转，并且在不同的心脏相位的不同角度区域记录数据。 在向前运动终止后的起始心脏期获取数据。 C形臂平面以相同的速度在角度区域上的向后运动中均匀地旋转，并且在不同的心脏相位的不同角度区域记录数据。 捕获的数据在完成采集后终止反向运动后重建。