公开(公告)号：US20080246770A1

公开(公告)日：2008-10-09

申请号：US12064671

申请日：2006-08-23

申请人： Gundolf Kiefer ,  Juergen Weese

发明人： Gundolf Kiefer ,  Juergen Weese

IPC分类号： G06T11/20

CPC分类号： G06T15/50

摘要： There is described a method for generating a 2-D image of a 3-D object represented by a volume data set comprising a multiplicity of data points each having an opacity value. A plurality of notional rays are cast through the 3-D object and for each ray, a ray path is divided into a plurality of base sampling intervals defined by data points on the path. If it is determined that a difference in opacity values across a base sampling interval can become greater than a pre-determined value, successively smaller sampling regions are generated within the base sampling interval until it is determined that a difference in opacity values across each generated smaller sampling interval in the base interval is less than the pre-determined threshold. Values indicative of an interaction between the ray and the 3-D object in the sampling intervals along the path are accumulated using a direct volume rendering procedure to determine a pixel value in the 2-D image.

摘要翻译： 描述了一种用于产生由包括多个数据点的体数据集合表示的3-D对象的二维图像的方法，每个数据点具有不透明度值。 通过3-D物体投射多个意向射线，并且对于每个射线，射线路径被划分为由路径上的数据点定义的多个基本采样间隔。 如果确定跨基准采样间隔的不透明度值的差异可能变得大于预定值，则在基本采样间隔内产生相继较小的采样区域，直到确定每个产生的不透明度值的差异较小 基准间隔中的采样间隔小于预定阈值。 使用直接体积绘制程序累积沿着路径的采样间隔中指示射线与3-D物体之间的相互作用的值，以确定2-D图像中的像素值。

公开(公告)号：US07889900B2

公开(公告)日：2011-02-15

申请号：US11815452

申请日：2006-02-07

申请人： Juergen Weese ,  Eric Thelen ,  Gundolf Kiefer ,  Helko Lehmann ,  Ali Majidi ,  Jochen Peters

发明人： Juergen Weese ,  Eric Thelen ,  Gundolf Kiefer ,  Helko Lehmann ,  Ali Majidi ,  Jochen Peters

IPC分类号： G06K9/00 ,  A61B5/05

CPC分类号： G06T11/001

摘要： A method, computer program and device for creating a viewing protocol for medical images is described. At least a first site of interest is identified in a medical imaging data set captured from the patient. Patient record data or computer assisted detection information can be used to identify the site of interest, which may be a potential lesion. A viewing protocol for displaying medical images to a user is planned. The viewing protocol includes a viewing path along which an image of the site of interest will be displayed. The viewing protocol also includes a trigger associated with the site of interest. When the trigger event is encountered the dynamic mode of image display is reconfigured to dynamically highlight the site of interest. The viewing protocol can then be used to control the display of images so as to provide, for example, a virtual endoscope.

摘要翻译： 描述了一种用于创建用于医学图像的观看协议的方法，计算机程序和设备。 在从患者获取的医学成像数据集中识别至少第一感兴趣的位置。 患者记录数据或计算机辅助检测信息可用于识别感兴趣的位点，这可能是潜在的病变。 计划用于向用户显示医学图像的观看协议。 观看协议包括观看路径，通过该观看路径将显示感兴趣的场所的图像。 查看协议还包括与感兴趣的站点相关联的触发器。 当遇到触发事件时，重新配置图像显示的动态模式以动态突出显示感兴趣的站点。 然后可以使用观看协议来控制图像的显示，以便提供例如虚拟内窥镜。

公开(公告)号：US20070183649A1

公开(公告)日：2007-08-09

申请号：US10598745

申请日：2005-03-07

申请人： Gundolf Kiefer ,  Helko Lehmann ,  Jurgen Weese ,  Marc Busch

发明人： Gundolf Kiefer ,  Helko Lehmann ,  Jurgen Weese ,  Marc Busch

IPC分类号： G06K9/00

CPC分类号： G06T15/08 ,  G06T15/005

摘要： Medical imaging modalities generate increasingly more and very large three-dimensional data sets. According to an exemplary embodiment of the present invention, a three-dimensional data set of an object of interest is interactively visualized with a varying sampling rate in an image. Advantageously, a focus area may be moved by a user interactively during rendering, wherein the sampling rate of a particular part of the image is defined by its relative position to the focus area. Advantageously, this may allow for an improvement of an overall rendering performance.

摘要翻译： 医学成像模式产生越来越多和非常大的三维数据集。 根据本发明的示例性实施例，感兴趣对象的三维数据集在图像中以变化的采样率被交互地可视化。 有利地，焦点区域可以在渲染期间由用户交互地移动，其中图像的特定部分的采样率由其与焦点区域的相对位置来定义。 有利地，这可以允许改进整体渲染性能。

公开(公告)号：US20070161892A1

公开(公告)日：2007-07-12

申请号：US10599864

申请日：2005-04-11

申请人： Kai Eck ,  Alexandra Groth ,  Gundolf Kiefer ,  Helko Lehmann ,  Jorg Bredno ,  Jurgen Weese

发明人： Kai Eck ,  Alexandra Groth ,  Gundolf Kiefer ,  Helko Lehmann ,  Jorg Bredno ,  Jurgen Weese

IPC分类号： A61B5/05

CPC分类号： G06F19/321 ,  A61B5/055 ,  A61B6/03 ,  A61B6/541 ,  A61B8/0833 ,  A61B8/0841 ,  A61B8/463 ,  A61B8/466 ,  A61B10/0233 ,  A61B90/36 ,  G06F19/00 ,  G16H50/50

摘要： In real-time three-dimensional imaging the choice of the visualization method and orientation is crucial for intervention success. The key question is what to ignore and what to show in real-time applications, where user control is not appropriate. The invention addresses this problem by visualizing an intervention (caused by a user) to an object of interest without the requirement of an interactive input by the user. Advantageously, according to an exemplary embodiment of the present invention, parameters for a visualization procedure are automatically chosen during data acquisition which may allow for an efficient tracking of the actual orientation and relative position of the structure with respect to the object of interest.

摘要翻译： 在实时三维成像中，可视化方法和方向的选择对于干预成功至关重要。 关键的问题是什么要忽略，什么显示在实时应用程序，用户控制不合适。 本发明通过将干预（由用户引起）视觉化为感兴趣的对象而不需要用户的交互式输入来解决该问题。 有利地，根据本发明的示例性实施例，在数据获取期间自动选择用于可视化过程的参数，这可以有效地跟踪结构相对于感兴趣对象的实际取向和相对位置。

公开(公告)号：US08040352B2

公开(公告)日：2011-10-18

申请号：US10559050

申请日：2004-05-26

申请人： Marc Busch ,  Gundolf Kiefer ,  Jürgen Weese

发明人： Marc Busch ,  Gundolf Kiefer ,  Jürgen Weese

IPC分类号： G06T15/10 ,  G06T15/20 ,  G06T17/00 ,  G06T15/50

CPC分类号： G06T15/08

摘要： Sampling frequency of a ray casting for generating a projection image is varied in dependence of information derived from a 3D volume data during rendering. Furthermore, an interpolation is performed for skipped pixels for which no ray casting was performed in the projection image, based on this information.

摘要翻译： 用于产生投影图像的射线投射的采样频率根据在渲染期间从3D体积数据导出的信息而变化。 此外，基于该信息，对投影图像中不进行射线投射的跳过像素进行内插。

公开(公告)号：US07742631B2

公开(公告)日：2010-06-22

申请号：US10598635

申请日：2005-03-03

申请人： Jurgen Weese ,  Marc Busch ,  Gundolf Kiefer ,  Helko Lehmann

发明人： Jurgen Weese ,  Marc Busch ,  Gundolf Kiefer ,  Helko Lehmann

IPC分类号： G06K9/00

CPC分类号： G06T15/503

摘要： High frequency signals cannot be reconstructed properly from sampled data if the sampling frequency lies below the Nyquist rate. The invention addresses this problem by choosing few additional sample points along a trajectory intersecting the region comprising the high frequency signals, such as an edge. Intermediate rendering data is used to determine the additional sample points. Therefore, according to an exemplary embodiment of the present invention, 4 adaptively chosen sample points per pixel may provide a visual quality comparable to 16 times super-sampling, but at a much lower computational cost.

摘要翻译： 如果采样频率低于奈奎斯特速率，则高频信号无法从采样数据中正确重建。 本发明通过沿着与包括高频信号的区域（例如边缘）相交的轨迹的几个附加采样点来解决这个问题。 中间渲染数据用于确定附加采样点。 因此，根据本发明的示例性实施例，每像素4个自适应选择的采样点可以提供与16次超采样相当的视觉质量，但是以低得多的计算成本。

公开(公告)号：US20080316226A1

公开(公告)日：2008-12-25

申请号：US12093762

申请日：2006-11-16

申请人： Martin Weibrecht ,  Olivier Ecabert ,  Juergen Weese ,  Gundolf Kiefer

发明人： Martin Weibrecht ,  Olivier Ecabert ,  Juergen Weese ,  Gundolf Kiefer

IPC分类号： G06T3/40 ,  G06T15/10

CPC分类号： G06T15/10

摘要： A method allowing display of time-varying merged high resolution and low resolution image data with a smooth frame rate. In one embodiment the high resolution data is structural image data and the low resolution image data is functional image data. The functional image data is gathered (20) into groups and each group is rendered and merged (24) together. The merged images produced are then stored (28) in a First In First Out (FIFO) buffer for display. While the merged images are displayed the next set of functional image data is merged and rendered and supplied to the FIFO buffer, allowing a smooth frame rate to be achieved. A computer program and a medical imaging apparatus using the method are also disclosed.

摘要翻译： 允许以平滑的帧速率显示时变合并的高分辨率和低分辨率图像数据的方法。 在一个实施例中，高分辨率数据是结构图像数据，低分辨率图像数据是功能图像数据。 将功能图像数据（20）收集到组中，并且将每个组渲染并合并（24）在一起。 然后将所生成的合并图像（28）存储在先进先出（FIFO）缓冲器中用于显示。 当显示合并的图像时，下一组功能图像数据被合并并呈现并提供给FIFO缓冲器，从而允许实现平滑的帧速率。 还公开了一种使用该方法的计算机程序和医学成像设备。

公开(公告)号：US20070299639A1

公开(公告)日：2007-12-27

申请号：US11573795

申请日：2005-07-27

申请人： Juergen Weese ,  Gundolf Kiefer ,  Marc Busch ,  Helko Lehmann

发明人： Juergen Weese ,  Gundolf Kiefer ,  Marc Busch ,  Helko Lehmann

IPC分类号： G06F7/60

CPC分类号： G06T15/40 ,  G06T15/06

摘要： The present invention relates to direct volume rendering based on a light model applied to a 3D array of information data samples. Gradients are first estimated for the individuals samples, and a simple shading is done on the samples with low gradient, i.e. homogenous areas.

摘要翻译： 本发明涉及基于应用于信息数据样本的3D阵列的光模型的直接体绘制。 首先对个体样本估计渐变，并且对具有低梯度（即均匀区域）的样品进行简单的阴影。

公开(公告)号：US20070177005A1

公开(公告)日：2007-08-02

申请号：US10598635

申请日：2005-03-03

申请人： Jurgen Weese ,  Marc Busch ,  Gundolf Kiefer ,  Helko Lehmann

发明人： Jurgen Weese ,  Marc Busch ,  Gundolf Kiefer ,  Helko Lehmann

IPC分类号： H04N13/00

CPC分类号： G06T15/503

摘要： High frequency signals cannot be reconstructed properly from sampled data if the sampling frequency lies below the Nyquist rate. The invention addresses this problem by choosing few additional sample points along a trajectory intersecting the region comprising the high frequency signals, such as an edge. Intermediate rendering data is used to determine the additional sample points. Therefore, according to an exemplary embodiment of the present invention, 4 adaptively chosen sample points per pixel may provide a visual quality comparable to 16 times super-sampling, but at a much lower computational cost.

摘要翻译： 如果采样频率低于奈奎斯特速率，则高频信号无法从采样数据正确重建。 本发明通过沿着与包括高频信号的区域（例如边缘）相交的轨迹的几个附加采样点来解决这个问题。 中间渲染数据用于确定附加采样点。 因此，根据本发明的示例性实施例，每像素4个自适应选择的采样点可以提供与16次超采样相当的视觉质量，但是以低得多的计算成本。

公开(公告)号：US20060139361A1

公开(公告)日：2006-06-29

申请号：US10559050

申请日：2004-05-26

申请人： Marc Busch ,  Gundolf Kiefer ,  Jurgen Weese

发明人： Marc Busch ,  Gundolf Kiefer ,  Jurgen Weese

IPC分类号： G09G5/00

CPC分类号： G06T15/08

摘要： Because of the increasing size of digital images available, an interactive rendering speed at a high display quality continues to be a challenging task. According to the present invention, a sampling frequency of a ray casting for generating the projection image is varied in dependence of information derived from the 3D volume data during rendering. Furthermore, an interpolation is performed for skipped pixels for which no ray casting was performed in the projection image, based on-this information. Advantageously, the present invention allows for an improved image quality, while reducing a computation time required to generate an output image.

摘要翻译： 由于可用的数字图像的尺寸越来越大，高显示质量的交互式渲染速度仍然是一项具有挑战性的任务。 根据本发明，用于生成投影图像的射线投射的采样频率根据在渲染期间从3D数据量数据导出的信息而变化。 此外，基于该信息，对投影图像中不进行射线投射的跳过像素执行内插。 有利地，本发明允许改善图像质量，同时减少生成输出图像所需的计算时间。