公开(公告)号：US20100316270A1

公开(公告)日：2010-12-16

申请号：US12808682

申请日：2008-12-16

Applicant: Klaus Erhard ,  Michael Grass ,  Dirk Schaefer

Inventor： Klaus Erhard ,  Michael Grass ,  Dirk Schaefer

IPC: G06K9/00

CPC classification number: G06T11/006 ,  G06T2211/432

Abstract: The invention proposes a 3D reconstruction of a body and a body contour from transversally truncated projections using a polyhedral object model. Possible clinical applications arise in the field of guided biopsies on acquisition systems equipped with a flat panel detector, where truncated projections cannot be avoided in thorax and abdominal scan protocols. From, for example, a rotational run both a 3D volume reconstruction and a surface mesh reconstruction of a patient's shape is generated and then visualized simultaneously in order to help the physician guide the biopsy device and judge the distance from the patient's skin to the tissue of interest inside the reconstructed volume.

Abstract translation: 本发明提出了使用多面体对象模型从横截面的突起中进行身体和身体轮廓的3D重建。 可能的临床应用出现在配备有平板检测器的采集系统上的引导活检领域，其中在胸部和腹部扫描方案中不能避免截断的突起。 例如，通过旋转运行，生成3D体积重建和患者形状的表面网格重建，然后同时可视化，以帮助医生引导活检装置并判断从患者皮肤到组织的距离 重建体积内的兴趣。

公开(公告)号：US20100189337A1

公开(公告)日：2010-07-29

申请号：US12668043

申请日：2008-07-08

Applicant: Uwe Jandt ,  Dirk Schaefer ,  Michael Grass

Inventor： Uwe Jandt ,  Dirk Schaefer ,  Michael Grass

IPC: G06K9/00

CPC classification number: A61B6/504 ,  A61B6/4441 ,  A61B6/463 ,  A61B6/481 ,  A61B6/541 ,  G06T7/0012 ,  G06T7/564 ,  G06T7/596 ,  G06T7/60 ,  G06T11/006 ,  G06T17/00 ,  G06T2200/08 ,  G06T2207/10112 ,  G06T2207/10116 ,  G06T2207/20044 ,  G06T2207/30101 ,  G06T2211/404 ,  G06T2211/412

Abstract: A method and an apparatus for acquiring 3-dimensional images of coronary vessels (11), particularly of coronary veins, is proposed. 2-dimensional X-ray images (13) are acquired within a same phase of a cardiac motion. Then, a 3-dimensional centerline model (15) is generated based on these 2-dimensional images. From 2-dimensional projections of the centerline model into respective projection planes, the local diameters (w) of the vessels in the projection plane can be derived. Having the diameters, a 3-dimensional hull model of the vessel system can be generated and, optionally, 4-dimensional information about the vessel movement can be derived.

Abstract translation: 提出了一种用于获取冠状血管（11），特别是冠状静脉的三维图像的方法和装置。 在心脏运动的相同相位中获取2维X射线图像（13）。 然后，基于这些二维图像生成3维中心线模型（15）。 从中心线模型的二维投影到相应的投影平面，可以推导投影平面中容器的局部直径（w）。 具有直径，可以产生容器系统的3维船体模型，并且可以导出关于船只运动的4维信息。

公开(公告)号：US07659339B2

公开(公告)日：2010-02-09

申请号：US11484493

申请日：2006-07-11

Applicant: Victor Nasreddine ,  Sharon X. Guo ,  Dirk Schaefer ,  Christopher M. Ong

Inventor： Victor Nasreddine ,  Sharon X. Guo ,  Dirk Schaefer ,  Christopher M. Ong

IPC: C08L77/00 ,  C08L9/00

CPC classification number: C08L77/00 ,  C08L9/02 ,  C08L13/00 ,  C08L15/005 ,  C08L33/18 ,  C08L33/22 ,  C08L77/02 ,  C08L77/06 ,  C08L2666/14 ,  C08L2666/08 ,  C08L2666/26 ,  C08L2666/04

Abstract: The present invention relates to thermoplastic vulcanizates (TPVs) based on low Mooney, optionally hydrogenated nitrile butadiene rubber and polyamides. The present invention also relates to TPVs based on low Mooney, optionally, hydrogenated nitrile terpolymers and polyamides. TPVs prepared according to the present invention have improved morphology, smaller rubber particle size, and improved processability compared to TPVs containing non-low Mooney, optionally hydrogenated nitrile butadiene rubber.

Abstract translation: 本发明涉及基于低门尼，任选氢化丁腈橡胶和聚酰胺的热塑性硫化橡胶（TPV）。 本发明还涉及基于低门尼，任选的氢化腈三元共聚物和聚酰胺的TPV。 根据本发明制备的TPV与含有非低门尼，任选氢化的丁腈橡胶的TPV相比具有改进的形态，较小的橡胶粒度和改进的加工性能。

公开(公告)号：US20090238412A1

公开(公告)日：2009-09-24

申请号：US12305996

申请日：2007-06-18

Applicant: Michael Grass ,  Dirk Schaefer ,  Babak Movassaghi

Inventor： Michael Grass ,  Dirk Schaefer ,  Babak Movassaghi

IPC: G06T7/20 ,  G06T7/00

CPC classification number: A61B6/504 ,  A61B6/032 ,  A61B6/469 ,  A61B6/5264 ,  A61B6/527 ,  A61B6/541

Abstract: The analysis of a stenosis of a coronary vessel in three dimensions requires a motion compensated reconstruction. According to an exemplary embodiment of the present invention, an examination apparatus for local motion compensated reconstruction data set is provided, wherein the local motion compensated reconstruction vectors relating to a start point and an end point of the stenosis.

Abstract translation: 三维冠状动脉血管狭窄的分析需要运动补偿重建。 根据本发明的示例性实施例，提供了一种用于局部运动补偿重建数据集的检查装置，其中与狭窄的起始点和终点有关的局部运动补偿重建向量。

公开(公告)号：US09042628B2

公开(公告)日：2015-05-26

申请号：US13810292

申请日：2011-07-15

Applicant: Raoul Florent ,  Vincent Auvray ,  Michael Grass ,  Dirk Schaefer ,  Gert Schoonenberg

Inventor： Raoul Florent ,  Vincent Auvray ,  Michael Grass ,  Dirk Schaefer ,  Gert Schoonenberg

IPC: G06K9/00 ,  A61B6/02 ,  A61B6/12 ,  A61B6/00 ,  A61B19/00

CPC classification number: A61B6/022 ,  A61B6/12 ,  A61B6/4441 ,  A61B6/463 ,  A61B6/487 ,  A61B6/504 ,  A61B6/5223 ,  A61B6/5235 ,  A61B2090/364 ,  A61B2090/367

Abstract: A 3D-originated cardiac roadmapping device and method include providing 3D+t image data of a vascular structure of an object; acquiring 2D image data of the object that includes the vascular structure, where the 2D image data includes at least one 2D image. The method further includes projecting the vascular structure, thereby generating mask images based on the 3D+t image data; and registering the at least one 2D image with one of the mask images. The registration includes finding the maximum of a similarity factor between the mask images and the at least one 2D image. The method further includes generating a combination of the at least one 2D image and a projection of the vascular structure based on the 3D+t image data according to the registration; and displaying the combination as a guiding vessel tree projection.

Abstract translation: 3D起源的心脏路线图设备和方法包括提供物体的血管结构的3D + t图像数据; 获取包括血管结构的对象的2D图像数据，其中2D图像数据包括至少一个2D图像。 该方法还包括投影血管结构，从而基于3D + t图像数据生成掩模图像; 以及将所述至少一个2D图像与所述掩模图像中的一个对准。 登记包括找到掩模图像和至少一个2D图像之间的相似性因子的最大值。 该方法还包括根据登记产生基于3D + t图像数据的至少一个2D图像和血管结构的投影的组合; 并将该组合显示为引导血管树投影。

公开(公告)号：US08787646B2

公开(公告)日：2014-07-22

申请号：US13254001

申请日：2010-02-18

Applicant: Dirk Schaefer ,  Michael Grass

Inventor： Dirk Schaefer ,  Michael Grass

IPC: G06K9/00 ,  G06T11/00 ,  A61B6/03 ,  A61B6/02

CPC classification number: G06T11/005 ,  A61B6/027 ,  A61B6/032

Abstract: A method and apparatus are provided to reconstruct projection data obtained from CT imaging devices with offset detector geometries. According to one aspect of the present invention, a method is provided to reconstruct projection data obtained from CT imaging devices with offset detector geometries that includes the following steps: (i) matching projection data measured at opposing sides of the acquisition trajectory and splicing them together to generate a full, non-truncated projection data set; (ii) differentiation of the projection data; (iii) filtering the differentiated projection data with a filter, such as for example a Hilbert filter; (iv) applying redundancy weighting to the filtered projection data; and (v) back-projecting the redundancy weighted projection data to generate image data.

Abstract translation: 提供了一种方法和装置来重构从具有偏移检测器几何形状的CT成像装置获得的投影数据。 根据本发明的一个方面，提供了一种用于重建从具有偏移检测器几何的CT成像装置获得的投影数据的方法，其包括以下步骤：（i）匹配在获取轨迹的相对侧测量的投影数据并将它们拼接在一起 生成一个完整的，非截断的投影数据集; （ii）投影数据的区分; （iii）用滤波器（例如希尔伯特滤波器）过滤差分投影数据; （iv）对过滤的投影数据应用冗余权重; 和（v）反向投影冗余加权投影数据以产生图像数据。

公开(公告)号：US20130077847A1

公开(公告)日：2013-03-28

申请号：US13697445

申请日：2011-04-25

Applicant: Eberhard S. Hansis ,  Dirk Schaefer ,  Michael Grass

Inventor： Eberhard S. Hansis ,  Dirk Schaefer ,  Michael Grass

IPC: G06T11/00

CPC classification number: G06T11/008 ,  G06T11/006 ,  G06T2211/432

Abstract: Computed tomography (CT) reconstruction includes reconstructing an axially extended reconstructed image from a measured cone beam x-ray projection data set (Pm), optionally having an off-center geometry. The reconstructing is performed for an extended volume (eFOV) comprising a reconstructable volume (rFOV) of the measured cone beam x ray data set that is extended along the axial direction. The projection data set may be weighted in the volume domain. Iterative reconstruction may be used, including initializing a constant volume and performing one or more iterations employing a first iterative update followed by one or more iterations employing a second, different iterative update. Alternatively, backprojection filtration (BPF) reconstruction may be used, including transforming the projection data set to a new geometry including finite differences between neighboring projection views and performing BPF using Hilbert filtering along a plurality of different directions and averaging the resultant reconstructed images to generate the final reconstructed image.

Abstract translation: 计算机断层扫描（CT）重建包括从测量的锥形束X射线投影数据集（Pm）重建轴向延伸的重建图像，可选地具有偏心几何。 对包括沿轴向延伸的测量的锥形束x射线数据集的可重建体积（rFOV）的扩展体积（eFOV）进行重建。 投影数据集可以在体积域中加权。 可以使用迭代重建，包括初始化恒定体积并且使用第一迭代更新执行一个或多个迭代，随后使用第二，不同迭代更新的一个或多个迭代。 或者，可以使用反投影过滤（BPF）重建，包括将投影数据集变换为包括相邻投影视图之间的有限差异的新几何，并且使用沿着多个不同方向的希尔伯特滤波来执行BPF，并平均所得到的重建图像以产生 最终重建图像。

公开(公告)号：US20110058723A1

公开(公告)日：2011-03-10

申请号：US12990817

申请日：2009-05-05

Applicant: Uwe Jandt ,  Dirk Schaefer ,  Michael Grass

Inventor： Uwe Jandt ,  Dirk Schaefer ,  Michael Grass

IPC: G06K9/00

CPC classification number: G06T11/005 ,  G06T7/564 ,  G06T2211/412

Abstract: The present invention relates to an apparatus for generating an image of a moving object, wherein a movement of the object comprises a multiple of moving phases. The apparatus comprises a measured detection data providing unit (20) for providing measured detection data of the moving object, which have been detected by using a detection process and which are assigned to the moving phases. The apparatus comprises further a reconstruction unit (13) for reconstructing an image object of the object from the provided measured detection data and an adaptation unit (18) for adapting the image object for different moving phases such that simulated detection data are adapted to the measured detection data of the respective moving phase, wherein the simulated detection data are determined by simulating the detection process, which has been used for detecting the measured detection data assigned to the respective moving phase, with the image object.

Abstract translation: 本发明涉及一种用于生成移动物体的图像的装置，其中物体的移动包括多个移动相位。 该装置包括测量检测数据提供单元（20），用于提供已经通过使用检测处理检测并被分配给运动相位的移动物体的测量检测数据。 所述设备还包括用于根据所提供的测量的检测数据重建对象的图像对象的重建单元（13）和用于使图像对象适应不同的移动阶段的适配单元（18），使得模拟的检测数据适应于所测量的 检测数据，其中通过模拟已经用于检测分配给各个运动相位的测量检测数据的检测过程与图像对象来确定模拟检测数据。

公开(公告)号：US20090154787A1

公开(公告)日：2009-06-18

申请号：US11719554

申请日：2005-11-22

Applicant: Matthias Bertram ,  Til Aach ,  Georg Hans Rose ,  Dirk Schaefer

Inventor： Matthias Bertram ,  Til Aach ,  Georg Hans Rose ,  Dirk Schaefer

IPC: G06K9/00

CPC classification number: G06T11/005

Abstract: The present invention relates to an image reconstruction device and a corresponding method for reconstructing a 3D image of an object (7) from projection data of said object (7). In order to obtain 3D images having sharp high-contrast structures and almost no image blur, and in which streak artifacts (and noise in tissue-like regions) are strongly reduced, an image reconstruction device is proposed comprising: a first reconstruction unit (30) for reconstructing a first 3D image of said object (7) using the original projection data, an interpolation unit (31) for calculating interpolated projection data from said original projection data, —a second reconstruction unit (32) for reconstructing a second 3D image of said object (7) using at least the interpolated projection data, a segmentation unit (33) for segmentation of the first or second 3D image into high-contrast and low-contrast areas, a third reconstruction unit (34) for reconstructing a third 3D image from selected areas of said first and said second 3D image, wherein said segmented 3D image is used to select image values from said first 3D image for high-contrast areas and image values from said second 3D image for low-contrast areas.

Abstract translation: 本发明涉及一种从所述物体（7）的投影数据重建物体（7）的3D图像的图像重建装置和相应的方法。 为了获得具有锐利的高对比度结构并且几乎没有图像模糊的3D图像，并且其中强烈减少了条纹伪影（和组织样区域中的噪声），提出了一种图像重建装置，包括：第一重建单元（30 ），用于使用原始投影数据重建所述对象（7）的第一3D图像;内插单元（31），用于从所述原始投影数据计算内插投影数据;第二重建单元（32），用于重建第二3D图像 使用至少内插投影数据的分割单元（33），用于将第一或第二3D图像分割为高对比度和低对比度区域的分割单元（33），用于重建第三或第二3D图像的第三重建单元 所述第一和第二3D图像的所选区域的3D图像，其中所述分割的3D图像用于从所述第一3D图像中选择用于高对比度区域的图像值，并且来自所述第二3D图像的图像值 D图像用于低对比度区域。

公开(公告)号：US20080218510A1

公开(公告)日：2008-09-11

申请号：US11997340

申请日：2006-07-12

Applicant: Michael Grass ,  Volker Rasche ,  Dirk Schaefer

Inventor： Michael Grass ,  Volker Rasche ,  Dirk Schaefer

IPC: G06T15/00

CPC classification number: G06T11/005 ,  G06T2211/412

Abstract: A method for generating or reconstruction of three-dimensional (3D) images corresponding to a structure of interest (60) including: acquiring a plurality of image projections corresponding to a structure of interest (60); applying a shape model (66) at a selected 3D seed point (64); and adapting the shape model (66) to represent the structure of interest (60), yielding an adapted shape model. A system for generation and reconstruction of three-dimensional (3D) images. The system (10) includes: an imaging system (12) configured to provide projection data corresponding to a structure of interest (60); and a controller (50) in operable communication with the imaging system (50). The controller (50) is configured to: receive the projection data, (64); apply a shape model (66) at a selected 3D seed point (64); and adapt the shape model (66) to represent the structure of interest (60), thereby yielding an adapted shape model.

Abstract translation: 一种用于生成或重建对应于感兴趣结构（60）的三维（3D）图像的方法，包括：获取与感兴趣结构相对应的多个图像投影（60）; 在选定的3D种子点（64）处应用形状模型（66）; 以及使形状模型（66）适应于表示感兴趣的结构（60），产生适应的形状模型。 一种用于三维（3D）图像的生成和重建的系统。 系统（10）包括：成像系统（12），被配置为提供对应于感兴趣结构（60）的投影数据; 以及与成像系统（50）可操作地通信的控制器（50）。 控制器（50）被配置为：接收投影数据（64）; 在选定的3D种子点（64）上应用形状模型（66）; 并适应形状模型（66）来表示感兴趣的结构（60），从而产生适应的形状模型。