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21. 发明申请

WO2005057491A1 IMAGE SEGMENTATION IN A VOLUME DATA SET 审中-公开
标题翻译：体积数据集中的图像分割
公开(公告)号：WO2005057491A1
公开(公告)日：2005-06-23
申请号：PCT/IB2004/052569
申请日：2004-11-26
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , BUELOW, Thomas , GRASS, Michael , LORENZ, Christian , MANZKE, Robert
发明人： BUELOW, Thomas , GRASS, Michael , LORENZ, Christian , MANZKE, Robert
IPC分类号： G06T5/00
CPC分类号： G06T7/11 , G06T2207/10081 , G06T2207/30101
摘要： Coronary artery segmentation is a crucial task in cardiac CT image processing. This is often a tedious task performed manually by an operator. According to the present invention, a method is provided which combines data from multiple cardiac phases during the segmentation process in order to deliver a complete and continuous coronary vessel tree. Advantageously, this may allow for an improved visualization and segmentation of vessels, for example, in coronary CTA.
摘要翻译：冠状动脉分割是心脏CT图像处理中的关键任务。这通常是由操作员手动执行的繁琐的任务。根据本发明，提供了一种在分割过程中组合来自多个心脏相的数据以递送完整且连续的冠状动脉血管树的方法。有利地，这可以允许例如在冠状动脉CTA中改善血管的可视化和分割。

22. 发明申请

WO2004089217A1 COMPUTER TOMOGRAPHY METHOD FOR A PERIODICALLY MOVING OBJECT 审中-公开
标题翻译：用于周期性移动对象的计算机测绘方法
公开(公告)号：WO2004089217A1
公开(公告)日：2004-10-21
申请号：PCT/IB2004/001061
申请日：2004-04-02
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KÖHLER, Thomas , GRASS, Michael , PROKSA, Roland
发明人： KÖHLER, Thomas , GRASS, Michael , PROKSA, Roland
IPC分类号： A61B6/03
CPC分类号： A61B6/541 , A61B5/1135 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , A61B6/504
摘要： The invention relates to a computer tomography method in which a periodically moving object, in particular an organ of the body, is irradiated by a cone-shaped beam cluster (4) along a trajectory which runs on a cylindrical surface. The radiation transmitted through the object is measured by means of a detector unit (16), and at the same time the periodic movement of the object is recorded. In order to reconstruct the absorption distribution of the object, the measured values or the corresponding beams are rebinned to form a number of parallel projections, where for each of these projections a measured value is determined whose beam irradiates the object. The point in time at which this measured value was acquired is allocated to the respective projection. For the reconstruction, which may for example be carried out using a filtered back-projection, only projections whose allocated points in time lie within a predefined, specific time range (H1) within a period of the object movement are used.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中周期性移动的物体，特别是身体的脏器被沿着在圆柱形表面上运行的轨迹由锥形束簇（4）照射。通过检测器单元（16）测量透过物体的辐射，同时记录物体的周期性运动。为了重建物体的吸收分布，将测量值或对应的光束重新组合以形成多个平行投影，其中对于这些投影中的每一个，确定其光束照射物体的测量值。将获取该测量值的时间点分配给相应的投影。对于可以例如使用滤波反投影来执行的重建，仅使用其分配的时间点在物体移动的时间段内的预定义的特定时间范围（H1）内的投影。

23. 发明申请

WO2004075115A1 METHOD AND DEVICE FOR VOLUMETRIC IMAGE RECONSTRUCTION 审中-公开
标题翻译：用于体积图像重建的方法和装置
公开(公告)号：WO2004075115A1
公开(公告)日：2004-09-02
申请号：PCT/IB2004/000414
申请日：2004-02-10
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , GRASS, Michael , MANZKE, Robert , KÖHLER, Thomas
发明人： GRASS, Michael , MANZKE, Robert , KÖHLER, Thomas
IPC分类号： G06T11/00
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/503 , G06T11/005 , G06T2211/412 , Y10S378/901
摘要： The reconstruction of computer tomography data is very often based on a parallel rebinning step of the projection data prior to the filtered back projection. In case of cardiac reconstruction, a gating technique is applied to select appropriate projections for a time-dependent image reconstruction. Usually, the gating window is a function of the fan-beam / cone-beam projection only. According to the present invention, a function corresponding to the location on the detector surface, where the respective projection was detected is used to further verify whether the respective projection is truly within the selected gating window or not.
摘要翻译：计算机断层扫描数据的重建通常基于在滤波反投影之前的投影数据的并行重组步骤。在心脏重建的情况下，门控技术被应用于选择用于时间依赖图像重建的适当的投影。通常，门控窗口仅是扇形束/锥形束投影的功能。根据本发明，使用与检测器表面上检测到的各个投影的位置相对应的功能来进一步验证相应投影是否真正位于所选择的门控窗口内。

24. 发明申请

WO2008107816A1 ITERATIVE RECONSTRUCTION OF CORONARY ARTERIES 审中-公开
标题翻译：冠状动脉重建术
公开(公告)号：WO2008107816A1
公开(公告)日：2008-09-12
申请号：PCT/IB2008/050695
申请日：2008-02-27
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , HANSIS, Eberhard, Sebastian , GRASS, Michael , SCHÄFER, Dirk
发明人： HANSIS, Eberhard, Sebastian , GRASS, Michael , SCHÄFER, Dirk
IPC分类号： G06T11/00 , G06T5/00
CPC分类号： G06T5/008 , G06T5/002 , G06T5/30 , G06T11/005 , G06T11/006 , G06T2211/424
摘要： According to an exemplary embodiment of the present invention, an iterative reconstruction of coronary arteries comprises a filtering of projection data on the basis of a top-hat filter and an iterative reconstruction of the object of interest on the basis of a regularisation favouring sparse objects. This may provide for high contrast and detail.
摘要翻译：根据本发明的示例性实施例，冠状动脉的迭代重建包括基于顶帽过滤器和基于有利于稀疏对象的正则化的感兴趣对象的迭代重建的投影数据的过滤。这可以提供高对比度和细节。

25. 发明申请

WO2007060572A2 MOTION COMPENSATED CT RECONSTRUCTION OF HIGH CONTRAST OBJECTS 审中-公开
标题翻译：高对比度对象的运动补偿CT重建
公开(公告)号：WO2007060572A2
公开(公告)日：2007-05-31
申请号：PCT/IB2006/054232
申请日：2006-11-14
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , GRASS, Michael , SCHAEFER, Dirk , VAN STEVENDAAL, Udo
发明人： GRASS, Michael , SCHAEFER, Dirk , VAN STEVENDAAL, Udo
IPC分类号： G06T7/00 , G06T11/00 , A61B5/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/12 , A61B6/541 , G06T7/20 , G06T11/006 , G06T2207/10081 , G06T2207/30048 , G06T2211/412
摘要： 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.
摘要翻译：使用门控重建的心脏CT成像目前在其时间和空间分辨率上受到限制。根据本发明的示例性实施例，提供了一种检查装置，其中执行高对比度对象的识别。然后这个高对比度物体在相位中跟随，产生高对比度物体的运动矢量场，在此基础上进行运动补偿重建。

26. 发明申请

WO2007046024A1 AUTOMATIC ADAPTIVE SOFT TISSUE THRESHOLDING FOR TWO-PASS CT CONE-BEAM ARTIFACT REDUCTION 审中-公开
标题翻译：自动适应性软组织对两通CT锥体造影减少的影响
公开(公告)号：WO2007046024A1
公开(公告)日：2007-04-26
申请号：PCT/IB2006/053658
申请日：2006-10-06
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , FORTHMANN, Peter , GRASS, Michael , PROKSA, Roland
发明人： FORTHMANN, Peter , GRASS, Michael , PROKSA, Roland
IPC分类号： G06T11/00
CPC分类号： G06T11/008 , Y10S378/901
摘要： Since the soft tissue levels in an image usually comprise a variety of values between air and bone boundaries, it may not be obvious a priori what threshold value applies. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for determining the optimal weight for subtraction of a soft tissue correction image without performing a multitude of forward and backward projections. This may be provided determining a roughness function based on a plurality of subtractions of the soft tissue streak image, each subtraction corresponding to a different weighting of the streak image.
摘要翻译：由于图像中的软组织水平通常包括空气和骨骼边界之间的各种值，因此先验地显示什么阈值可能并不明显。根据本发明的示例性实施例，提供一种检查装置，其适于确定用于减去软组织校正图像的最佳权重，而不执行大量向前和向后的投影。可以提供这样来确定基于软组织条纹图像的多个减法的粗糙度函数，每个减法对应于条纹图像的不同加权。

27. 发明申请

WO2006120609A1 CONTINUOUS COMPUTER TOMOGRAPHY PERFORMING SUPER-SHORT-SCANS AND STRONGER WEIGHTING OF MOST RECENT DATA 审中-公开
标题翻译：连续计算机图像执行超短扫描和最新数据的强加权重
公开(公告)号：WO2006120609A1
公开(公告)日：2006-11-16
申请号：PCT/IB2006/051382
申请日：2006-05-03
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KÖHLER, Thomas , FORTHMANN, Peter , GRASS, Michael
发明人： KÖHLER, Thomas , FORTHMANN, Peter , GRASS, Michael
IPC分类号： A61B6/03 , G01N23/04
CPC分类号： G01T1/2985 , G01N23/046 , G01N2223/419 , G06T11/005 , G06T2211/412 , G06T2211/421 , G06T2211/428
摘要： A computer tomography apparatus and method, a computer-readable medium and a program element are provided for examining a region of interest (ROI) of an object or patient in real-time. When only a region of interest is to be reconstructed, it is sufficient to rotate the radiation source and detector elements such that they cover a circular arc whose extension is less than π+α, α being the beam angle of the radiation source. This scanning range is called super-short-scan. Super-short-scans produce less data. Consequently image reconstruction is quicker which is very preferable for real-time CT. The CT data can furthermore be weighted in a manner that data detected at the end of a super-short-scan are weighted stronger than data detected at the beginning of a super-short-scan.
摘要翻译：提供计算机断层摄影装置和方法，计算机可读介质和程序元素，用于实时检查对象或患者的感兴趣区域（ROI）。当仅需要重建感兴趣的区域时，旋转辐射源和检测器元件就足以覆盖其延伸小于p + a的圆弧，a是辐射源的光束角。该扫描范围称为超短扫描。超短扫描会产生较少的数据。因此，图像重建更快，这对于实时CT是非常优选的。此外，CT数据可以以超短扫描结束时检测到的数据的加权强于在超短扫描开始时检测到的数据的方式进行加权。

28. 发明申请

WO2006117720A3 ENERGY-RESOLVED PHOTON COUNTING FOR CT 审中-公开
公开(公告)号：WO2006117720A3
公开(公告)日：2006-11-09
申请号：PCT/IB2006/051285
申请日：2006-04-25
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , PROKSA, Roland , GRASS, Michael
发明人： PROKSA, Roland , GRASS, Michael
IPC分类号： G01N23/04 , G01T1/17
摘要： Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.

29. 发明申请

WO2005008597A2 RECONSTRUCTION OF AN IMAGE OF A MOVING OBJECT FROM VOLUMETRIC DATA 审中-公开
标题翻译：用体数据重建一个运动物体的图像
公开(公告)号：WO2005008597A2
公开(公告)日：2005-01-27
申请号：PCT/IB2004/051150
申请日：2004-07-07
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , KÖHLER, Thomas , GRASS, Michael , KUHN, Michael, Harald , PROKSA, Roland
发明人： KÖHLER, Thomas , GRASS, Michael , KUHN, Michael, Harald , PROKSA, Roland
IPC分类号： G06T11/00
CPC分类号： G06T7/20 , G06T11/005 , G06T2207/10081 , G06T2207/30048 , G06T2211/404 , G06T2211/412
摘要： In the CT imaging of non-homogeneously moving objects such as the heart or the coronary vessel tree, there is a problem that different parts of the objects are at rest at different points in time. Thus, a gated reconstruction with a globally selected time point does not yield a sharp image of such objects. According to the present invention, a motion of the object is estimated, describing the motion of selected regions of these objects. Then, on the basis of the estimated motion, time points are determined, where these areas have minimal motion. Then, an image is reconstructed, wherein the data from which the respective regions are reconstructed, correspond to the respective time points, where the regions have minimal motion. Due to this, an improved image qualify maybe provided.
摘要翻译：在诸如心脏或冠状血管树等非均匀移动物体的CT成像中，存在物体的不同部分在不同时间点静止的问题。因此，具有全局选定时间点的门控重建不会产生这样的对象的清晰图像。根据本发明，估计物体的运动，描述这些物体的选定区域的运动。然后，基于估计的运动，确定时间点，其中这些区域具有最小的运动。然后，重建图像，其中重构相应区域的数据对应于各区域具有最小运动的各个时间点。由于这一点，可能会提供改进的图像限定。

30. 发明申请

WO2004093684A1 GERÄT FÜR DIE ANGIOGRAPHISCHE RÖNTGEN-BILDGEBUNG 审中-公开
标题翻译： DEVICE血管造影X射线成像
公开(公告)号：WO2004093684A1
公开(公告)日：2004-11-04
申请号：PCT/IB2004/050476
申请日：2004-04-21
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N. V. , SCHMITT, Holger , GRASS, Michael , RASCHE, Volker
发明人： SCHMITT, Holger , GRASS, Michael , RASCHE, Volker
IPC分类号： A61B6/00
CPC分类号： A61B6/481 , A61B6/4441 , A61B6/504
摘要： Die Erfindung betrifft ein Röntgen-Bildgebungsgerät zur Visualisierung des Blutflusses in einem koronaren Gefäßbaum eines Patienten. Es wird gemäß der Erfindung ein erster Satz (1) von Röntgenprojektionsbildern des Gefäßbaumes in verschiedenen Phasen des Herzzyklus unter gleichzeitiger Aufzeichnung des EKG's (2) des Patienten aufgenommen. Sodann erfolgt mittels einer geeigneten Programmsteuerung von Computermitteln (17) des erfindungsgemäßen Gerätes eine Rekonstruktion der dreidimensionalen Struktur des Gefäßbaumes in den verschiedenen Phasen des Herzzyklus. Ein zweiter Satz (6) von Röntgenprojektionsbildern wird während der Gabe eines Kontrastmittels, wiederum unter Aufzeichnung des EKG's (7), aufgenommen. Die Erfindung schlägt zur Bestimmung der zeitabhängigen Kontrastmittelkonzentration innerhalb der rekonstruierten dreidimensionalen Struktur des Gefäßbaumes vor, einzelnen Gefäßsegmenten (5, 8) zugeordnete lokale Bildbereiche innerhalb der Röntgenprojektionsbilder des zweiten Satzes (6) entsprechend den räumlichen Positionen der Gefäßsegmente (5, 8) in der betreffenden Phase des Herzzyklus aufzufinden. Die Ermittlung der Kontrastmittelkonzentration im Bereich der Gefäßsegmente (5, 8) erfolgt dann durch Auswertung der Röntgenabsorbtion innerhalb der aufgefundenen lokalen Bildbereiche.
摘要翻译：本发明涉及一种X射线成像装置用于在患者的冠状血管树中的血液流动的可视化。它是按照本发明采取的，在心动周期的不同阶段的血管树的X射线投影图像中的第一组（1）用ECG的同时记录（2）病人的。然后，通过计算机的合适的程序的控制手段根据本发明的血管树的三维结构在心动周期的不同阶段的重构装置的装置（17）。 X射线投影图像的第二组（6）的造影剂的给药过程中被记录时，再次记录ECG（7）。本发明提出以确定所述血管树中，每个容器的段的重构的三维结构内依赖于时间的造影剂浓度（5,8）与（6）对应于所述血管段的在相应的空间位置（8 5），第二组的x射线投影图像中的局部图像区域相关联的发现心动周期的相位。然后造影剂浓度的血管段的区域中的确定（5,8）由所述发现局部图像区域内评估Röntgenabsorbtion。

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