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1. 发明授权

US10825215B2 Method and apparatus for generating an output image from a volume data set 有权
公开(公告)号：US10825215B2
公开(公告)日：2020-11-03
申请号：US15914267
申请日：2018-03-07
申请人： Thomas Brunner , David Wenzel Kaltenbacher , Christoph Köhler , Bernd Schreiber
发明人： Thomas Brunner , David Wenzel Kaltenbacher , Christoph Köhler , Bernd Schreiber
IPC分类号： G06T11/60 , G06T5/40 , G06T15/08
摘要： A method and an apparatus for generating an output image from a volume data set that includes a plurality of voxels are provided. In the method, a rendered 2D image is generated from the volume data set by volume rendering. In order to generate an output image with adjusted brightness, which makes a manual readjustment of the brightness superfluous, an adjustment factor is determined based on a brightness value of pixels in the rendered 2D image. By multiplying a respective voxel brightness value of the voxels in the volume data set by the adjustment factor, a brightness-adjusted volume data set is generated. By volume rendering from the brightness-adjusted volume data set, the brightness-adjusted output image is generated.

2. 发明申请

US20180260990A1 Method and Apparatus for Generating an Output Image from a Volume Data Set 审中-公开
公开(公告)号：US20180260990A1
公开(公告)日：2018-09-13
申请号：US15914267
申请日：2018-03-07
申请人： Thomas Brunner , David Wenzel Kaltenbacher , Christoph Köhler , Bernd Schreiber
发明人： Thomas Brunner , David Wenzel Kaltenbacher , Christoph Köhler , Bernd Schreiber
IPC分类号： G06T11/60 , G06T5/40
CPC分类号： G06T11/60 , G06T5/40 , G06T15/08
摘要： A method and an apparatus for generating an output image from a volume data set that includes a plurality of voxels are provided. In the method, a rendered 2D image is generated from the volume data set by volume rendering. In order to generate an output image with adjusted brightness, which makes a manual readjustment of the brightness superfluous, an adjustment factor is determined based on a brightness value of pixels in the rendered 2D image. By multiplying a respective voxel brightness value of the voxels in the volume data set by the adjustment factor, a brightness-adjusted volume data set is generated. By volume rendering from the brightness-adjusted volume data set, the brightness-adjusted output image is generated.

3. 发明授权

US08039804B2 Method for evaluating an image dataset acquired by a radiation-based image acquisition device 有权
标题翻译：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。

4. 发明授权

US10357208B2 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.

5. 发明申请

US20180098740A1 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.

6. 发明授权

US08538505B2 Method for 3-D data collection with a biplane C-arm system with biplane acquisition multiplexing 有权
标题翻译：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。

7. 发明申请

US20110040178A1 METHOD FOR 3-D DATA COLLECTION WITH A BIPLANE C-ARM SYSTEM WITH BIPLANE ACQUISITION MULTIPLEXING 有权
标题翻译：利用BIPLANC采集多路复用的BIPLANC C-ARM系统进行三维数据采集的方法
公开(公告)号：US20110040178A1
公开(公告)日：2011-02-17
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： A61B5/05
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。

8. 发明申请

US20090236511A1 Method for evaluating an image dataset acquired by a radiation-based image acquisition device 有权
标题翻译：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：US20090236511A1
公开(公告)日：2009-09-24
申请号：US12381494
申请日：2009-03-12
申请人： Thomas Brunner , Christoph Kohler , Bernd Schreiber
发明人： Thomas Brunner , Christoph Kohler , Bernd Schreiber
IPC分类号： G01D18/00 , G01R35/00
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。

9. 发明授权

US07583830B2 Method for correcting image artifacts due to detector overexposure in computed tomography 有权
标题翻译：用于在计算机断层摄影中校正由于检测器过度曝光引起的图像伪影的方法
公开(公告)号：US07583830B2
公开(公告)日：2009-09-01
申请号：US11301927
申请日：2005-12-13
申请人： Bernd Schreiber , Thomas Brunner
发明人： Bernd Schreiber , Thomas Brunner
IPC分类号： G06K9/00 , A61B6/00 , G01N23/00 , G21K1/12 , H05G1/60 , H01J37/20
CPC分类号： G06T11/005
摘要： In a method for reconstructing a 3D CT image from a number of 2D projection images each 2D projection image is divided at an arbitrarily selectable position by a substantially vertical image line and the projection image is automatically electronically analyzed to detect whether clipping occurs on the left side or on the right side, or on both sides, of the image line. For each side of the image line at which clipping is detected, a horizontal coordinate at which the clipping ends is identified. The grayscale values at the side of the horizontal coordinate opposite to the side at which the image line is located are extrapolated so that the clipping is removed. The corrected 2D projection images are then used to reconstruct a 3D image, in which capping artifacts, that would otherwise be present, or avoided or substantially minimized due to the corrections made in the 2D projections.
摘要翻译：在用于从多个2D投影图像重建3D CT图像的方法中，每个2D投影图像通过基本上垂直的图像线在任意可选择的位置被分割，并且投影图像被自动电子分析以检测是否在左侧发生削波或在图像的右侧或两侧。对于检测到剪切的图像行的每一侧，识别剪切结束的水平坐标。水平坐标与图像线所在的一侧相反侧的灰度值被外推，以便去除剪辑。然后，校正的2D投影图像用于重构由于2D投影中进行的校正而否则将存在或避免或基本上最小化的加盖伪影的3D图像。

10. 发明申请

US20100254585A1 OVEREXPOSURE CORRECTION FOR LARGE VOLUME RECONSTRUCTION IN COMPUTED TOMOGRAPHY APPARATUS 审中-公开
标题翻译：计算机图像设备中大容量重建的过度曝光校正
公开(公告)号：US20100254585A1
公开(公告)日：2010-10-07
申请号：US12752443
申请日：2010-04-01
申请人： Thomas Brunner , Bernd Schreiber
发明人： Thomas Brunner , Bernd Schreiber
IPC分类号： G06K9/00
CPC分类号： G06T11/00
摘要： A method and system of processing medical images such as projection images of large volume structures obtained by two-pass scanning for generating three-dimensional images. Measured values of each image frame is calculated as an image line. Over-exposed portions of the image line are detected to at one end of the image line and then at the other end of the image line. A determination is made of the approximate center of the image line. A line integral of the image line is generated and then using an assumed shape the over-exposed portions are extrapolated. The processed image frames may then be combined to generate the three-dimensional image.
摘要翻译：一种处理医学图像的方法和系统，例如通过用于产生三维图像的二次扫描获得的大体积结构的投影图像。每个图像帧的测量值被计算为图像行。图像线的过度曝光部分被检测到图像线的一端，然后在图像线的另一端。确定图像线的大致中心。产生图像线的积分线，然后使用假设的形状外推曝光部分。然后可以组合经处理的图像帧以产生三维图像。

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