公开(公告)号：US09779498B2

公开(公告)日：2017-10-03

申请号：US14855893

申请日：2015-09-16

申请人： Frank Dennerlein ,  Oliver Schütz

发明人： Frank Dennerlein ,  Oliver Schütz

IPC分类号： G06T7/00 ,  A61B6/02 ,  G06K9/46 ,  G06T7/20 ,  G06T15/00 ,  G06T19/00 ,  A61B6/00 ,  G06T11/00

CPC分类号： G06T7/0012 ,  A61B6/025 ,  A61B6/027 ,  A61B6/4452 ,  A61B6/5205 ,  A61B6/5211 ,  A61B6/5258 ,  G06K9/4604 ,  G06T7/20 ,  G06T11/008 ,  G06T15/00 ,  G06T19/00 ,  G06T2207/10116 ,  G06T2211/436

摘要： In the present embodiments, a statement related to an image point or an image region in a reconstructed x-ray image is made in relation to the reliability of the reconstructed grayscale value for the image points of a 2D/3D x-ray image. A confidence level is formed for the grayscale value from a first number of the available x-ray images in relation to a second number of required x-ray images for a complete reconstruction of the respective grayscale value of the 2D/3D x-ray image to be imaged.

公开(公告)号：US08885793B2

公开(公告)日：2014-11-11

申请号：US13540588

申请日：2012-07-02

申请人： Frank Dennerlein

发明人： Frank Dennerlein

IPC分类号： A61B6/03 ,  A61B6/00 ,  G06K9/36 ,  G06T11/00

CPC分类号： A61B6/03 ,  A61B6/4085 ,  A61B6/4233 ,  A61B6/4441 ,  A61B6/4458 ,  A61B6/504 ,  G06K9/36 ,  G06T11/003 ,  G06T11/006 ,  G06T2211/421

摘要： An alternative analytical method for tomographic reconstruction in the 2D parallel-beam geometry is presented. This method may follow a filtering and backprojection scheme and may involve a global filtering in the projection domain and a local filtering in the image domain. For example, the method may include applying Hilbert filtering to the received projection data, computing an antiderivative of the filtered data, backprojecting the antiderivative into the image domain, and computing the 2D Laplacian of the backprojection image.

摘要翻译： 提出了2D平行光束几何中断层成像重建的另一种分析方法。 该方法可以遵循滤波和反投影方案，并且可以涉及投影域中的全局滤波和图像域中的局部滤波。 例如，该方法可以包括将Hilbert滤波应用于所接收的投影数据，计算滤波数据的反向推导，反向投影到图像域中，以及计算反投影图像的2D拉普拉斯算子。

公开(公告)号：US08824760B2

公开(公告)日：2014-09-02

申请号：US12588573

申请日：2009-10-20

申请人： Frank Dennerlein ,  Frédéric Noo

发明人： Frank Dennerlein ,  Frédéric Noo

IPC分类号： A61B6/03

CPC分类号： A61B6/03 ,  G06T11/006 ,  G06T2211/421

摘要： At least one embodiment of the invention relates to a method for the reconstruction of image data from an examined object, using measuring data, wherein the measuring data were first recorded during a relative movement between a radiation source on a computer tomography system and the examined object. In at least one embodiment, the image reconstruction is based on a back projection of the filtered measuring data. During the back projection, a back projection weight that depends on the respective image point is used and the power with which the back projection weight is used is selectable.

摘要翻译： 本发明的至少一个实施例涉及一种用于使用测量数据从被检查对象重建图像数据的方法，其中测量数据首先在计算机断层摄影系统上的辐射源与被检查对象之间的相对移动期间被记录 。 在至少一个实施例中，图像重建基于滤波测量数据的反投影。 在背投影期间，使用取决于相应图像点的背投影重量，并且可以选择使用背投影重量的功率。

公开(公告)号：US08630474B2

公开(公告)日：2014-01-14

申请号：US13537298

申请日：2012-06-29

申请人： Frank Dennerlein ,  Frederic Noo

发明人： Frank Dennerlein ,  Frederic Noo

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： G01N23/046 ,  G01N2223/345 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/006 ,  G06T2211/421

摘要： For filtered back-projection of a projection image data set, the projection image data set is cosine-weighted. The cosine-weighted projection image data set within the image plane of the projection image data set is subjected to a two-dimensional Radon transformation. The Radon transform of the cosine-weighted projection image data set differentiated with respect to the distance from an image origin of an image coordinate system. The derivative of the Radon transform is redundancy-weighted. The redundancy-weighted derivative is subjected to a two-dimensional Radon back-transformation. The Radon back-transform is differentiated and back-projected with respect to an image column coordinate. A differentiation step width entering into the differentiation is varied depending on depth.

摘要翻译： 对于投影图像数据集的滤波反投影，投影图像数据集被余弦加权。 在投影图像数据组的图像平面内设置的余弦加权投影图像数据进行二维Radon变换。 余弦加权投影图像数据集的Radon变换相对于距离图像坐标系的图像原点的距离不同。 Radon变换的导数是冗余加权的。 冗余加权导数进行二维Radon反向变换。 Radon反向变换相对于图像列坐标进行区分和反投影。 进入分化的分化步长根据深度而变化。

公开(公告)号：US20130028498A1

公开(公告)日：2013-01-31

申请号：US13537298

申请日：2012-06-29

申请人： Frank Dennerlein ,  Frederic Noo

发明人： Frank Dennerlein ,  Frederic Noo

IPC分类号： G06K9/40

CPC分类号： G01N23/046 ,  G01N2223/345 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/006 ,  G06T2211/421

摘要： For filtered back-projection of a projection image data set, the projection image data set is cosine-weighted. The cosine-weighted projection image data set within the image plane of the projection image data set is subjected to a two-dimensional Radon transformation. The Radon transform of the cosine-weighted projection image data set differentiated with respect to the distance from an image origin of an image coordinate system. The derivative of the Radon transform is redundancy-weighted. The redundancy-weighted derivative is subjected to a two-dimensional Radon back-transformation. The Radon back-transform is differentiated and back-projected with respect to an image column coordinate. A differentiation step width entering into the differentiation is varied depending on depth.

摘要翻译： 对于投影图像数据集的滤波反投影，投影图像数据集被余弦加权。 在投影图像数据组的图像平面内设置的余弦加权投影图像数据进行二维Radon变换。 余弦加权投影图像数据集的Radon变换相对于距离图像坐标系的图像原点的距离不同。 Radon变换的导数是冗余加权的。 冗余加权导数进行二维Radon反向变换。 Radon反向变换相对于图像列坐标进行区分和反投影。 进入分化的分化步长根据深度而变化。

公开(公告)号：US20110085637A1

公开(公告)日：2011-04-14

申请号：US12902237

申请日：2010-10-12

申请人： Jan Boese ,  Frank Dennerlein ,  Holger Kunze

发明人： Jan Boese ,  Frank Dennerlein ,  Holger Kunze

IPC分类号： A61B6/03 ,  G06T17/00

CPC分类号： G06T11/006 ,  A61B6/027

摘要： A method for producing a 3D image dataset of an object with an imaging system having an x-ray source and an x-ray detector is provided. A series of two-dimensional arrays of cone beam data from the detector is acquired while the source moves along a substantially planar trajectory around the object. The trajectory is described by a series of source points serially numbered by a counter parameter. The cone beam data is differentiated with respect to the counter parameter at a fixed ray direction to produce a derivative of the cone beam data. The derivative is filtered with a Hilbert-like filter to produce filtered cone beam data. The acquired or the filtered cone beam data is multiplied with a redundancy weighting function. The cone beam data is back-projected to reconstruct a 3D image dataset.

摘要翻译： 提供了一种使用具有X射线源和X射线检测器的成像系统来生成物体的3D图像数据集的方法。 来自检测器的一系列锥形束数据的二维阵列被获取，同时源沿着物体周围的基本上平面的轨迹移动。 轨迹由一系列通过计数器参数串行编号的源点描述。 锥形束数据在固定的射线方向上相对于计数器参数微分，以产生锥形束数据的导数。 用希尔伯特滤波器滤波导数，以产生滤波的锥束数据。 所获取的或经滤波的锥束数据与冗余加权函数相乘。 锥形束数据被反投影以重建3D图像数据集。

公开(公告)号：US09153411B2

公开(公告)日：2015-10-06

申请号：US13564909

申请日：2012-08-02

申请人： Jan Boese ,  Frank Dennerlein ,  Thomas Redel

发明人： Jan Boese ,  Frank Dennerlein ,  Thomas Redel

IPC分类号： H01J35/00 ,  H01J35/30 ,  A61B6/03 ,  A61B6/00

CPC分类号： H01J35/30 ,  A61B6/03 ,  A61B6/4435

摘要： An X-ray imaging apparatus has at least one X-ray image system rotatable about an examination volume. The X-ray image system is controlled such that during a continuous rotation of the system, at least one 2D projection image is recorded. An image generation facility generates the 2D projection image from the measured data. The X-ray source includes an X-ray focus which can be changed in terms of position, which, during the recording of the 2D projection image, moves counter to the direction of rotation of the X-ray image system such that its spatial position in a fixed coordinate system does not change. The X-ray detector records several 2D partial images, from which the 2D projection image is calculated with the rotational movement of the X-ray detector being at least approximately compensated. The 2D projection images have significantly reduced image blur.

摘要翻译： X射线成像装置具有能够围绕检查体积旋转的至少一个X射线图像系统。 控制X射线图像系统，使得在系统的连续旋转期间，记录至少一个2D投影图像。 图像生成设备根据测量数据生成2D投影图像。 X射线源包括可以在2D投影图像的记录期间相对于X射线图像系统的旋转方向移动的位置方面改变的X射线焦点，使得其X射线焦点的空间位置 在固定的坐标系中不改变。 X射线检测器记录几个2D部分图像，由X射线检测器的旋转运动至少近似地补偿2D计算图像。 2D投影图像显着减少图像模糊。

公开(公告)号：US08750582B2

公开(公告)日：2014-06-10

申请号：US13101208

申请日：2011-05-05

申请人： Jan Boese ,  Anja Borsdorf ,  Frank Dennerlein ,  Holger Kunze

发明人： Jan Boese ,  Anja Borsdorf ,  Frank Dennerlein ,  Holger Kunze

IPC分类号： G06K9/00

CPC分类号： G06T11/005 ,  A61B6/4441

摘要： A method for recording and reconstructing a three-dimensional image dataset is proposed. A plurality of projection images are acquired under different recording geometries in relation to an object to be recorded by an X-ray apparatus, in particular a C-arm X-ray apparatus. At least two projection images are recorded for at least one recording geometry, in particular for every recording geometry. The three-dimensional image dataset is reconstructed from the project images.

摘要翻译： 提出了一种用于记录和重建三维图像数据集的方法。 相对于由X射线装置，特别是C臂X射线装置记录的物体，在不同的记录几何形状下获取多个投影图像。 对于至少一个记录几何形状记录至少两个投影图像，特别是对于每个记录几何形状。 从项目图像重建三维图像数据集。

公开(公告)号：US20120201352A1

公开(公告)日：2012-08-09

申请号：US13363668

申请日：2012-02-01

申请人： Frank Dennerlein ,  Oliver Hornung ,  Markus Kowarschik

发明人： Frank Dennerlein ,  Oliver Hornung ,  Markus Kowarschik

IPC分类号： G01N23/04

CPC分类号： G01N23/046 ,  A61B6/027 ,  A61B6/032 ,  A61B6/035 ,  A61B6/4441 ,  A61B6/4452 ,  A61B6/4458 ,  A61B6/583 ,  A61B6/584 ,  G01N2223/3303 ,  G01N2223/419 ,  G06T11/005

摘要： A method for obtaining a 3D image dataset of an object of interest is proposed. A plurality of 2D X-ray images are captured and a 3D reconstruction is carried out using filtered back projection. The projection parameters have been measured with the aid of a calibrating phantom, possibly using an interpolation or extrapolation of such measurements. A model of effect strings of the components in an X-ray imaging device is obtained, and the model parameters are identified based on imaging of a calibrating phantom. A projection matrix can then be calculated for any positions on any desired trajectories, without having to use imaging of a calibrating phantom at precisely that position and desired trajectory.

摘要翻译： 提出了一种用于获取感兴趣对象的3D图像数据集的方法。 捕获多个2D X射线图像，并且使用滤波反投影来执行3D重建。 已经借助于校准体模测量了投影参数，可能使用这种测量的内插或外推法。 获得X射线成像装置中的部件的效应串的模型，并且基于校准体模的成像来识别模型参数。 然后可以对任何所需轨迹上的任何位置计算投影矩阵，而无需在精确的位置和期望的轨迹上使用校准模型的成像。

公开(公告)号：US20110085636A1

公开(公告)日：2011-04-14

申请号：US12902236

申请日：2010-10-12

申请人： Frank Dennerlein

发明人： Frank Dennerlein

IPC分类号： A61B6/03

CPC分类号： A61B6/032 ,  A61B6/4028 ,  A61B6/547 ,  A61B6/587 ,  G01N23/046 ,  G01N2223/419

摘要： A method for generation of a scan path for an x-ray source and/or an x-ray detector of an x-ray system is provided. CT-type imaging on the x-ray system is enabled by traversing the scan path upon simultaneous acquisition of a series of x-ray images. An original scan path of the x-ray source and/or of the x-ray detector is provided, where the scan path is defined by a series of original acquisition points. A viewing axis from the x-ray source to the object and/or the detector is identified for at least one acquisition point on the scan path. A modified scan path is generated by displacement of the at least one acquisition point at least partially along the viewing axis so that the scanning movement upon traversing the modified scan path can be reproduced as in the original scan path.

摘要翻译： 提供了一种用于产生用于x射线系统的X射线源和/或X射线检测器的扫描路径的方法。 通过在同时获取一系列X射线图像的同时遍历扫描路径，能够对x射线系统进行CT型成像。 提供x射线源和/或x射线检测器的原始扫描路径，其中扫描路径由一系列原始采集点限定。 从X射线源到物体和/或检测器的观察轴被识别为扫描路径上的至少一个采集点。 通过至少部分地沿着观察轴移动至少一个采集点来产生修改的扫描路径，使得可以像原始扫描路径那样再现遍历修改的扫描路径的扫描移动。