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。

公开(公告)号：US20080036409A1

公开(公告)日：2008-02-14

申请号：US11829355

申请日：2007-07-27

Applicant: Dirk Schaefer

Inventor： Dirk Schaefer

IPC: H02H7/08

CPC classification number: G05B19/416 ,  E05D13/003 ,  E05F15/00 ,  E05F15/40 ,  E05F15/668 ,  E05F15/72 ,  E05Y2201/21 ,  E05Y2201/23 ,  E05Y2201/246 ,  E05Y2201/26 ,  E05Y2201/266 ,  E05Y2201/434 ,  E05Y2201/462 ,  E05Y2400/302 ,  E05Y2400/36 ,  E05Y2400/506 ,  E05Y2400/51 ,  E05Y2400/514 ,  E05Y2400/532 ,  E05Y2400/822 ,  E05Y2900/00 ,  E05Y2900/106 ,  E06B9/84 ,  G05B2219/45242

Abstract: The invention relates to a method for controlled braking of an electrically powered lifting action in the event of a failure, such that at least one of the nominal values for “rotational direction” and/or “operating speed” and/or “door position” and/or “motor capacity” and/or “motor current” is ascertained and compared with an actual value, and such that a motorized braking process or motorized stopping process is triggered by a departure of the actual value from the nominal value that lies outside a predetermined range. In addition the invention relates to a device for applying said method.

Abstract translation: 本发明涉及一种用于在发生故障的情况下电动提升作用的受控制动的方法，使得“旋转方向”和/或“操作速度”和/或“门位置”的标称值中的至少一个 和/或“电动机电流”和/或“电动机电流”被确定并与实际值进行比较，并且使得电动制动过程或电动停止过程由实际值与位于外部的标称值的偏离而触发 预定范围。 此外，本发明涉及一种应用所述方法的装置。

公开(公告)号：US06375881B1

公开(公告)日：2002-04-23

申请号：US09367347

申请日：1999-10-26

Applicant: Thomas Foelster ,  Ralph Greiner ,  Dirk Schaefer

Inventor： Thomas Foelster ,  Ralph Greiner ,  Dirk Schaefer

IPC: B29B906

CPC classification number: C08J5/045 ,  B29C45/0005 ,  B29C70/10 ,  B29K2093/00 ,  B29K2105/0088 ,  B29K2293/00 ,  B29K2311/00 ,  B29K2311/10 ,  B29K2995/006

Abstract: A process for the preparation of fiber-reinforced plastic molding includes (1) shortening the fibers to a length of less than 30 mm; (2) introducing the fibers and the plastics present in the solid state, separately from one another, into a mixing chamber of a die press, wherein the plastic is in particulate form; (3) thoroughly mixing the plastic and fibers to give a solids mixture; (4) transporting the solids mixture through die orifices of the die press; (5) heating the solids mixture in the zone before or in the orifices of the die; (6) enclosing at least part or partly embedding the fibers by the plastic during or after the heating of the solids mixture; and (7) comminuting the granulated material for subsequent molding.

Abstract translation: 制备纤维增强塑料成型的方法包括（1）将纤维缩短到小于30mm的长度; （2）将固体状态的纤维和塑料彼此分开地引入模压机的混合室中，其中塑料为颗粒形式; （3）充分混合塑料和纤维，得到固体混合物; （4）将固体混合物输送通过模压机的模口; （5）在模具的孔口之前或之内加热该区域中的固体混合物; （6）在固体混合物的加热期间或之后包围至少部分或部分地通过塑料包埋纤维; 和（7）粉碎粒状材料以备后续成型。

公开(公告)号：US09280837B2

公开(公告)日：2016-03-08

申请号：US13121800

申请日：2009-10-07

Applicant: Michael Grass ,  Dirk Schaefer ,  Gert Antonius Franciscus Schoonenberg

Inventor： Michael Grass ,  Dirk Schaefer ,  Gert Antonius Franciscus Schoonenberg

IPC: G06F19/00 ,  G06T11/00 ,  G06T15/08 ,  A61B6/00 ,  A61B6/06

CPC classification number: G06T11/008 ,  A61B6/06 ,  A61B6/4441 ,  A61B6/481 ,  A61B6/504 ,  A61B6/5247 ,  A61B6/542 ,  G06F19/00 ,  G06F19/321 ,  G06T15/08 ,  G06T2211/404 ,  G16H40/63

Abstract: The present invention refers to an angiographic image acquisition system and method which can beneficially be used in the scope of minimally invasive image-guided interventions. In particular, the present invention relates to a system and method for graphically visualizing a pre-interventionally virtual 3D representation of a patient's coronary artery tree's vessel segments in a region of interest of a patient's cardiovascular system to be three-dimensionally reconstructed. Optionally, this 3D representation can then be fused with an intraoperatively acquired fluoroscopic 2D live image of an interventional tool. According to the present invention, said method comprises the steps of subjecting the image data set of the 3D representation associated with the precalculated optimal viewing angle to a 3D segmentation algorithm (S4) in order to find the contours of a target structure or lesion to be examined and interventionally treated within a region of interest and automatically adjusting (S5) a collimator wedge position and/or aperture of a shutter mechanism used for collimating an X-ray beam emitted by an X-ray source of a C-arm-based 3D rotational angiography device or rotational gantry-based CT imaging system to which the patient is exposed during an image-guided radiographic examination procedure based on data obtained as a result of said segmentation which indicate the contour and size of said target structure or lesion. The aim is to reduce the region of interest to a field of view that covers said target structure or lesion together with a user-definable portion of the surrounding vasculature.

Abstract translation: 本发明涉及一种血管造影图像采集系统和方法，可有利地用于微创图像引导干预的范围。 特别地，本发明涉及一种用于以图形方式可视化患者心血管系统感兴趣区域中的患者冠状动脉树血管段的预先介入虚拟3D表示以进行三维重构的系统和方法。 可选地，该3D表示随后可以与介入工具的术中获取的荧光透视2D实况图像融合。 根据本发明，所述方法包括以下步骤：将与预先计算的最佳视角相关联的3D表示的图像数据集进行3D分割算法（S4），以便将目标结构或病变的轮廓找到为 在感兴趣区域内进行检查和介入处理，并自动调整（S5）用于准直由基于C臂的3D的X射线源发射的X射线束的快门机构的准直器楔位置和/或孔径 旋转血管造影装置或基于旋转台架的CT成像系统，其中基于由所述分割结果获得的指示所述目标结构或病变的轮廓和大小的图像引导放射线检查程序期间所述患者暴露于所述CT成像系统。 目的是将感兴趣的区域减少到覆盖所述目标结构或病变的视野以及周围脉管系统的用户可定义的部分。

公开(公告)号：US20130322724A1

公开(公告)日：2013-12-05

申请号：US13810680

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: G06T7/00

CPC classification number: G06T7/0012 ,  A61B6/12 ,  A61B6/463 ,  A61B6/487 ,  A61B6/504 ,  A61B6/5235 ,  A61B90/37 ,  A61B2090/364 ,  A61B2090/365 ,  A61B2090/3764 ,  G06T7/32 ,  G06T19/00 ,  G06T2207/10121 ,  G06T2207/30101

Abstract: The invention relates to adaptive roadmapping providing improved information to the user, comprising the following steps: providing pre-navigation image data representing at least a part of a vascular structure comprising a tree-like structure with a plurality of sub-trees; generating a vessel representation on the basis of pre-navigation image data; acquiring live image data of the object, which object comprises the vascular structure; wherein the vascular structure contains an element of interest; determining spatial relation of the pre-navigation image data and the live image data; analysing the live image data by identifying and localizing the element in the live image data; determining a sub-tree in which the element is positioned, wherein the determining is based on the localization of the element and on the spatial relation; and selecting a portion of the vascular structure based on the determined sub-tree; generating a combination of the live image data and an image of the selected portion of the vascular structure; and displaying the combination as a tailored roadmap. The element may be physical object, for example an interventional tool or device.

Abstract translation: 本发明涉及向用户提供改进信息的自适应路线图，包括以下步骤：提供表示包括具有多个子树的树状结构的血管结构的至少一部分的导航前图像数据; 基于导航前图像数据生成船舶表示; 获取对象的实时图像数据，该对象包括血管结构; 其中所述血管结构含有感兴趣的元件; 确定所述导航前图像数据和实况图像数据的空间关系; 通过识别和定位实时图像数据中的元素来分析实况图像数据; 确定所述元素所在的子树，其中所述确定基于所述元素的定位和所述空间关系; 以及基于所确定的子树选择所述血管结构的一部分; 生成活体图像数据和血管结构的所选部分的图像的组合; 并将该组合显示为定制的路线图。 该元件可以是物理对象，例如介入工具或设备。

公开(公告)号：US08184883B2

公开(公告)日：2012-05-22

申请号：US12093458

申请日：2006-11-14

Applicant: Michael Grass ,  Dirk Schaefer ,  Udo Van Stevendaal

Inventor： Michael Grass ,  Dirk Schaefer ,  Udo Van Stevendaal

IPC: G06K9/00 ,  A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/12 ,  A61B6/541 ,  G06T7/20 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/30048 ,  G06T2211/412

Abstract: Cardiac CT imaging using gated reconstruction is currently limited in its temporal and spatial resolution. According to an exemplary embodiment of the present invention, an examination apparatus is provided in which an identification of a high contrast object is performed. This high contrast object is then followed through the phases, resulting in a motion vector field of the high contrast object, on the basis of which a motion compensated reconstruction is then performed.

Abstract translation: 使用门控重建的心脏CT成像目前在其时间和空间分辨率方面受到限制。 根据本发明的示例性实施例，提供一种检查装置，其中执行高对比度对象的识别。 然后，该对比度较高的对象随后进入相位，导致高对比度对象的运动矢量场，然后基于此进行运动补偿重建。