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1. 发明申请

WO2010041193A2 METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY 审中-公开
标题翻译：使用位移几何来改进CT图像采集的方法和装置
公开(公告)号：WO2010041193A2
公开(公告)日：2010-04-15
申请号：PCT/IB2009054353
申请日：2009-10-05
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , FORTHMANN PETER , KOEHLER THOMAS , VAN STEVENDAAL UDO , BERTRAM MATTHIAS , WIESNER STEFFEN , SCHRETTER COLAS
发明人： FORTHMANN PETER , KOEHLER THOMAS , VAN STEVENDAAL UDO , BERTRAM MATTHIAS , WIESNER STEFFEN , SCHRETTER COLAS
IPC分类号： G01N23/04 , A61B6/03
CPC分类号： A61B6/032 , A61B5/107 , A61B6/027
摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.
摘要翻译：提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。可以基于物体（108）的尺寸来确定横向位移量。源和检测器可以被调节以改变横向视场的大小。由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。所测量的投影数据和模拟投影数据可用于获得第二数据集。可以将第二数据集与第一数据集进行比较以产生校正数据集。

2. 发明申请

WO2008075267A3 DEVICE AND METHOD FOR IMAGING AN OBJECT 审中-公开
标题翻译：用于成像对象的设备和方法
公开(公告)号：WO2008075267A3
公开(公告)日：2008-08-14
申请号：PCT/IB2007055083
申请日：2007-12-13
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , SHECHTER GILAD , GLASBERG SHMUEL , VAN STEVENDAAL UDO , FORTHMANN PETER , KOEHLER THOMAS , BONTUS CLAAS
发明人： SHECHTER GILAD , GLASBERG SHMUEL , VAN STEVENDAAL UDO , FORTHMANN PETER , KOEHLER THOMAS , BONTUS CLAAS
IPC分类号： A61B6/06
CPC分类号： A61B6/06
摘要： An imaging device (100,200) for imaging a volume of interest (5,45) of a subject (4,44) comprises a radiation source (1) for emitting radiation (6), which is arranged for rotational movement around an axis (8) of the subject (4,44), a collimator (3) for collimating the radiation (6) at least in the axial direction of the subject (4,44) before traversing through the subject (4,44), a detector (2) for receiving the collimated radiation (11,12,13,14,15,16) that has traversed through the subject (4,44), and a control unit (7) for controlling the collimator (3) based on at least one geometry parameter that defines a geometrical relationship between the volume of interest (5,45) and the imaging device (100,200). The imaging device (100,200) provides for a reduced dose of radiation applied to the subject (4,44).
摘要翻译：用于对受试者（4,44）感兴趣的体积（5,45）进行成像的成像装置（100,200）包括用于发射辐射（6）的辐射源（1），其布置成围绕轴线（8 ），用于在穿过被摄体（4,44）之前至少在被检体（4,44）的轴向上校准辐射（6）的准直器（3），检测器（4,44） 2），用于接收已经穿过被摄体的准直辐射（11,12,13,14,15,16），以及用于至少基于控制单元（7）控制准直仪（3）的控制单元（7）一个几何参数，其定义感兴趣的体积（5,45）和成像装置（100,200）之间的几何关系。成像装置（100,200）提供施加到对象的减少剂量的辐射（4,44）。

3. 发明申请

WO2012093361A3 IMAGING SYSTEM FOR IMAGING AN OBJECT 审中-公开
标题翻译：用于成像对象的成像系统
公开(公告)号：WO2012093361A3
公开(公告)日：2012-10-11
申请号：PCT/IB2012050037
申请日：2012-01-04
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , FORTHMANN PETER , KOEHLER THOMAS
发明人： FORTHMANN PETER , KOEHLER THOMAS
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/416 , G06T2211/424
摘要： The invention relates to an imaging system for imaging an object. Projection data of the object are acquired by using a radiation source emitting primary radiation (14) from a primary focal spot (15) and unwanted secondary radiation (16) from secondary focal spots (17). A first image of the object is reconstructed from the acquired projection data, a forward projection of the secondary radiation through the first image is simulated for generating secondary projection data, and a second image is generated based on the acquired projection data and the secondary projection data. Since the secondary projection data, which can generally cause image artifacts, are determined, the reconstruction unit can consider these unwanted secondary projection data while reconstructing the second image, in order to reduce the influence of the secondary projection data on the reconstructed second image, thereby improving the image quality.
摘要翻译：本发明涉及一种用于对物体成像的成像系统。通过使用从主焦点（15）发射主要辐射（14）的辐射源和来自次焦点（17）的不期望的次级辐射（16））来获取对象的投影数据。从获取的投影数据重建物体的第一图像，模拟通过第一图像的次级辐射的向前投影以产生二次投影数据，并且基于所获取的投影数据和二次投影数据生成第二图像。由于确定了通常可以引起图像伪影的二次投影数据，所以重建单元可以在重构第二图像的同时考虑这些不需要的二次投影数据，以便减少二次投影数据对重构的第二图像的影响，由此提高图像质量。

4. 发明申请

WO2007129244A3 X-RAY TUBE WITH OSCILLATING ANODE 审中-公开
标题翻译：带振动阳极的X射线管
公开(公告)号：WO2007129244A3
公开(公告)日：2008-01-10
申请号：PCT/IB2007051525
申请日：2007-04-25
申请人： PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , FORTHMANN PETER , BONTUS CLAAS , KOEHLER THOMAS
发明人： FORTHMANN PETER , BONTUS CLAAS , KOEHLER THOMAS
IPC分类号： A61B6/03 , H01J35/28
CPC分类号： A61B6/032 , A61B6/4021 , H01J35/101 , H01J35/26 , H01J35/28 , H01J2235/10
摘要： It is described an X-ray tube (205), in particular for use in computed tomography, comprising an electron source (250), for generating an electron beam (255), an electron deflection device (256) for deflecting the generated electron beam (255), a control unit (257) being coupled to the electron deflection device (256) for spatially controlling the deflection, and an anode (206), which is arranged such that the electron beam (255) impinges onto a focal spot of a surface of the anode (206). Thereby the anode (206) is movable along a z-axis in an oscillating manner, the surface of the anode (206) is oriented oblique with respect to the z-axis, and the control unit (257) is adapted to spatially control the focal spot (255 a) in such a manner that the focal spot moves essentially in a discrete manner between a first focal spot position (106a, 406a) having a first z-coordinate and a second focal spot position (106b, 406b) having a second z-coordinate being different from the first z-coordinate.
摘要翻译：描述了一种特别用于计算机断层摄影的X射线管（205），包括用于产生电子束（255）的电子源（250），用于使所产生的电子束偏转的电子偏转装置（256）（255），耦合到电子偏转装置（256）的空间控制偏转的控制单元（257）和阳极（206），其布置成使得电子束（255）撞击到阳极的表面（206）。因此，阳极（206）可以以振荡方式沿z轴移动，阳极（206）的表面相对于z轴倾斜定向，并且控制单元（257）适于空间控制焦点（255a），使得焦点基本上以离散的方式移动在具有第一z坐标的第一焦斑位置（106a，406a）和具有第一焦点位置（106b，406b）之间的焦点第二z坐标与第一z坐标不同。

5. 发明申请

WO2010052615A3 MOTION INFORMATION EXTRACTION 审中-公开
标题翻译：运动信息提取
公开(公告)号：WO2010052615A3
公开(公告)日：2011-05-12
申请号：PCT/IB2009054792
申请日：2009-10-28
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS INTELLECTUAL PROPERTY , FORTHMANN PETER , SCHMITT HOLGER , VAN STEVENDAAL UDO , KOEHLER THOMAS
发明人： FORTHMANN PETER , SCHMITT HOLGER , VAN STEVENDAAL UDO , KOEHLER THOMAS
IPC分类号： G06T5/00 , G06T7/00 , G06T7/20
CPC分类号： G06T11/005 , G06T7/11 , G06T7/174 , G06T7/215 , G06T2207/10081 , G06T2207/20224 , G06T2207/30004 , G06T2211/412
摘要： A method includes creating a second set of projection data that includes substantially only selected structure of interest based on a first set of projection data that includes the selected structure of interest and other structure. Another method includes generating a second plurality of sliding window slices for a last slice of a first plurality of slices, selecting a second sliding window slice from the second plurality of sliding window slices based on the last slice of the first plurality of slices, and generating a second plurality of slices, including a first slice and a last slice, from a range of projection data around projection data corresponding to the last slice of the first plurality of slices.
摘要翻译：一种方法包括创建第二组投影数据，该投影数据基于包括所选择的感兴趣结构和其他结构的第一组投影数据基本上仅包括所选择的感兴趣结构。另一种方法包括为第一多个片段的最后片段生成第二多个滑动窗口片段，基于第一多个片段的最后片段从第二多个滑动窗口片段中选择第二滑动窗口片段，以及生成从与所述第一多个片段的最后片段相对应的投影数据周围的投影数据的范围的第二多个片段，包括第一片段和最后片段。

6. 发明申请

WO2007113704A3 METHOD FOR RECONSTRUCTION IMAGES AND RECONSTRUCTION SYSTEM FOR RECONSTRUCTING IMAGES 审中-公开
标题翻译：重建图像的方法和重建图像的重建系统
公开(公告)号：WO2007113704A3
公开(公告)日：2008-11-06
申请号：PCT/IB2007050896
申请日：2007-03-15
申请人： PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , KOEHLER THOMAS , FORTHMANN PETER
发明人： KOEHLER THOMAS , FORTHMANN PETER
IPC分类号： G06T11/00 , G06T7/00
CPC分类号： G06T11/005 , A61B6/027 , G06T7/30 , G06T2207/30004
摘要： A reconstruction method for an image of an object, the reconstruction method comprising receiving a first projection data set representing information about said object, receiving a second projection data set representing information about said object, reconstructing a first image of said object using the first projection data set, reconstructing a second image of said object using the second projection data set, performing a registration between the first image and the second image, and fusing the first image and the second image to said image of said object, wherein the first projecting data set and the second projecting data set are achieved by using a single radiation type.
摘要翻译：一种用于对象的图像的重建方法，所述重建方法包括接收表示关于所述对象的信息的第一投影数据集，接收表示关于所述对象的信息的第二投影数据集，使用所述第一投影数据重建所述对象的第一图像使用所述第二投影数据集重建所述对象的第二图像，执行所述第一图像和所述第二图像之间的对准，以及将所述第一图像和所述第二图像融合到所述对象的所述图像，其中，所述第一投影数据集并且通过使用单个辐射类型来实现第二投影数据集。

7. 发明申请

WO2008099314A2 APPARATUS AND METHOD FOR DETERMINING HIGH DENSITY SHADOWS IN PROJECTION DATA 审中-公开
标题翻译：用于确定投影数据中的高密度阴影的装置和方法
公开(公告)号：WO2008099314A2
公开(公告)日：2008-08-21
申请号：PCT/IB2008050458
申请日：2008-02-08
申请人： PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , KOEHLER THOMAS , FORTHMANN PETER , SCHMITT HOLGER
发明人： KOEHLER THOMAS , FORTHMANN PETER , SCHMITT HOLGER
CPC分类号： G06T11/005 , A61B6/032 , A61B6/4233 , G06T7/11 , G06T7/174 , G06T2207/10081 , G06T2207/10124 , G06T2207/20224 , G06T2207/30004
摘要： The invention relates to an apparatus for determining high density shadows in projection data, wherein the apparatus comprises a first projection data providing unit (1, 2, 3, 6, 7, 8) for providing first projection data, which correspond to a projection through an object having an amount of high density elements. The apparatus comprises further a second projection data providing unit (12) for providing second projection data, which correspond to a projection through a model of the object, in which the amount of high density elements is reduced. The apparatus further comprises a determination unit (13) for determining high density shadows in the first projection data by comparing the first projection data with the second projection data.
摘要翻译：本发明涉及一种用于确定投影数据中的高密度阴影的装置，其中所述装置包括第一投影数据提供单元（1,2,3,6,7,8），用于提供第一投影数据，所述第一投影数据对应于通过具有高密度元素量的物体。该装置还包括第二投影数据提供单元（12），用于提供第二投影数据，第二投影数据对应于通过对象的模型的投影，其中高密度元素的量被减少。该装置还包括：确定单元，用于通过将第一投影数据与第二投影数据进行比较来确定第一投影数据中的高密度阴影。

8. 发明申请

WO2007004195A2 RECONSTRUCTION ALGORITHM FOR OBJECT POINT OUTSIDE THE SCAN-FIELD-OF-VIEW 审中-公开
标题翻译：在扫描视野外的对象点的重构算法
公开(公告)号：WO2007004195A2
公开(公告)日：2007-01-11
申请号：PCT/IB2006052247
申请日：2006-07-04
申请人： PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , KOEHLER THOMAS , FORTHMANN PETER
发明人： KOEHLER THOMAS , FORTHMANN PETER
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/432
摘要： CT scanners have a certain scan-field-of-view defined by the fan-angle of the system. According to an exemplary embodiment of the present invention, object points outside the scan-field-of-view may be reconstructed on the basis of a system of linear equations which may be solved iteratively and with reasonable effort. Therefore, explicit regularization techniques may be applied to recover the unknown object function.
摘要翻译： CT扫描仪具有由系统的扇角定义的特定扫描视场。根据本发明的示例性实施例，可以基于线性方程式的系统重建扫描视野外的物点，其可以以合理的努力迭代地求解。因此，可以应用明确的正则化技术来恢复未知对象的功能。

9. 发明申请

WO2006067671A3 METHOD AND APPARATUS FOR CARDIAC COMPUTED TOMOGRAPHY 审中-公开
标题翻译：心脏计算机图像的方法和装置
公开(公告)号：WO2006067671A3
公开(公告)日：2006-09-14
申请号：PCT/IB2005054198
申请日：2005-12-13
申请人： PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , FORTHMANN PETER , KOEHLER THOMAS , MANZKE ROBERT , GRASS MICHAEL , ZIEGLER ANDY
发明人： FORTHMANN PETER , KOEHLER THOMAS , MANZKE ROBERT , GRASS MICHAEL , ZIEGLER ANDY
IPC分类号： A61B6/00 , A61B6/03
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503
摘要： A method of recording images of the heart in computed tomography is provided in which, in order to prevent movement artifacts, the images are reconstructed on the basis of similar movement states of the heart and different radiation intensities are used for different movement states. During recording operation low-resolution images are continually reconstructed from the recorded data. The movement state of the heart is determined from the low- resolution images, preferably by comparing successive images. During the desired heart phase with little heart movement the power of the X-ray tube is increased. A high-resolution reconstruÌtion is carried out retrospectively from data recorded with a high radiation intensity in similar movement states with little heart movement. Also disclosed are a CT apparatus and a computer program for carrying out the method.
摘要翻译：提供了一种在计算机断层摄影中记录心脏图像的方法，其中为了防止运动伪像，基于心脏的相似运动状态重建图像，并且不同的辐射强度用于不同的运动状态。在记录操作期间，从记录的数据中连续重建低分辨率图像。优选地，通过比较连续图像，从低分辨率图像确定心脏的移动状态。在期望的心脏移动期间，X射线管的功率增加。从具有较小的心脏运动的相似运动状态下以高辐射强度记录的数据追溯地进行高分辨率重建。还公开了一种用于执行该方法的CT装置和计算机程序。

10. 发明申请

WO2005036467A8 COHERENT-SCATTER COMPUTED TOMOGRAPHY 审中-公开
标题翻译：相干散光计算机图像
公开(公告)号：WO2005036467A8
公开(公告)日：2005-09-29
申请号：PCT/IB2004051968
申请日：2004-10-05
申请人： PHILIPS INTELLECTUAL PROPERTY , KONINKL PHILIPS ELECTRONICS NV , VAN STEVENDAAL UDO , BONTUS CLAAS , FORTHMANN PETER
发明人： VAN STEVENDAAL UDO , BONTUS CLAAS , FORTHMANN PETER
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/416 , Y10S378/901
摘要： Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q of the scattered x-ray photons is acquired. The projection data is interpreted as line integrals in the x y-q space and the projection data is resorted to correspond to an acquisition along any source trajectory. Due to this, an exact helical reconstruction algorithms may be applied and redundant data may be used to obtain a better image quality.
摘要翻译：来自相干散射X射线的已知重建技术应用非精确重建技术。根据本发明，获得了散射的x射线光子的相对宽的波矢量传输q。投影数据被解释为x y-q空间中的线积分，并且投影数据被用来对应于沿着任何源轨迹的获取。因此，可以应用精确的螺旋重建算法，并且可以使用冗余数据来获得更好的图像质量。

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