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公开(公告)号：DE10211016A1
公开(公告)日：2003-09-25
申请号：DE10211016
申请日：2002-03-13
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： SCHOMBERG HERMANN
Abstract: The invention relates to an X-ray apparatus which includes an X-ray source ( 2 ) for the emission of a conical X-ray beam and an X-ray detector ( 3 ) for the multiple detection of the X-rays after their passage through an object to be examined, being arranged along an object axis ( 4 ), while the X-ray source ( 2 ) and the X-ray detector ( 3 ) are displaced along a trajectory. In order to increase the size of the reconstructable examination zone without increasing the size of the X-ray detector, and in order to minimize the problem caused by projections truncated in the transverse direction, the invention proposes an X-ray apparatus which includes means ( 12, 14, 15 ) for changing the position and/or the orientation of the X-ray detector ( 3 ) relative to the X-ray source ( 2 ) and a control unit ( 11 ) for displacing the X-ray source ( 2 ) and the X-ray detector ( 3 ) along the trajectory and for controlling the position and/or the orientation of the X-ray detector ( 3 ) during the detection of the X-rays.
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Patent Agency Ranking
公开(公告)号：AU2003206099A1
公开(公告)日：2003-09-22
申请号：AU2003206099
申请日：2003-03-10
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： SCHOMBERG HERMANN
Abstract: The invention relates to an X-ray apparatus which includes an X-ray source ( 2 ) for the emission of a conical X-ray beam and an X-ray detector ( 3 ) for the multiple detection of the X-rays after their passage through an object to be examined, being arranged along an object axis ( 4 ), while the X-ray source ( 2 ) and the X-ray detector ( 3 ) are displaced along a trajectory. In order to increase the size of the reconstructable examination zone without increasing the size of the X-ray detector, and in order to minimize the problem caused by projections truncated in the transverse direction, the invention proposes an X-ray apparatus which includes means ( 12, 14, 15 ) for changing the position and/or the orientation of the X-ray detector ( 3 ) relative to the X-ray source ( 2 ) and a control unit ( 11 ) for displacing the X-ray source ( 2 ) and the X-ray detector ( 3 ) along the trajectory and for controlling the position and/or the orientation of the X-ray detector ( 3 ) during the detection of the X-rays.
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公开(公告)号：AU2003206099A8
公开(公告)日：2003-09-22
申请号：AU2003206099
申请日：2003-03-10
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： SCHOMBERG HERMANN
Abstract: The invention relates to an X-ray apparatus which includes an X-ray source ( 2 ) for the emission of a conical X-ray beam and an X-ray detector ( 3 ) for the multiple detection of the X-rays after their passage through an object to be examined, being arranged along an object axis ( 4 ), while the X-ray source ( 2 ) and the X-ray detector ( 3 ) are displaced along a trajectory. In order to increase the size of the reconstructable examination zone without increasing the size of the X-ray detector, and in order to minimize the problem caused by projections truncated in the transverse direction, the invention proposes an X-ray apparatus which includes means ( 12, 14, 15 ) for changing the position and/or the orientation of the X-ray detector ( 3 ) relative to the X-ray source ( 2 ) and a control unit ( 11 ) for displacing the X-ray source ( 2 ) and the X-ray detector ( 3 ) along the trajectory and for controlling the position and/or the orientation of the X-ray detector ( 3 ) during the detection of the X-rays.
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公开(公告)号：DE59813012D1
公开(公告)日：2005-09-22
申请号：DE59813012
申请日：1998-11-20
Applicant: PHILIPS INTELLECTUAL PROPERTY
Inventor： ALDEFELD BERND , SCHOMBERG HERMANN , HOLZ DIETRICH
IPC: A61B5/055 , G01R33/385 , G01R33/565
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公开(公告)号：WO2005104952A8
公开(公告)日：2006-10-05
申请号：PCT/IB2005051252
申请日：2005-04-18
Inventor： SCHOMBERG HERMANN
IPC: A61B6/03
CPC classification number: A61B6/4085 , A61B6/027 , A61B6/032 , A61B6/4028 , A61B6/4275 , A61B6/4411 , A61B6/4488 , A61B6/466 , H01J35/30
Abstract: An electron beam computed tomography system is provided that uses a cone beam geometry to generate truly three-dimensional images. The required cone beam projections can be obtained using a single sweep of the electron beam along the target ring (20). The target ring (20) is non-planar and shaped roughly like a 5/8th segment of the boundary curve of a saddle. The resulting source trajectory satisfies Tuy's completeness condition with respect to a sizeable volume of interest around the isocenter of the system. The detector (28) has a large area and is built from a plurality of small, brick-shaped detector modules (32), which are placed side by side along a detector trajectory that is a mirror image, through the isocenter, of the source trajectory. Owing to the special shapes of the target ring and the detector strip, a cone-beam of x-rays starting from the target ring and heading towards the opposite segment of the detector strip is not blocked by other portions of the detector.
Abstract translation: 提供了一种电子束计算机断层摄影系统，其使用锥形束几何来产生真正的三维图像。 可以使用沿着目标环（20）的电子束的单次扫描来获得所需的锥形束投影。 目标环（20）是非平面的并且大体上类似于鞍座的边界曲线的第五/第八段。 所得到的源轨迹相对于系统的等角点周围的相当大的感兴趣体积来满足Tuy的完整性条件。 检测器（28）具有大的面积，并且由多个小的砖形检测器模块（32）构建，所述多个小的砖形检测器模块（32）沿着作为镜像的检测器轨迹并排放置，通过等角点源 弹道。 由于目标环和检测器条的特殊形状，从目标环开始朝向检测器条的相对段的X射线的锥形束不被检测器的其它部分阻挡。
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公开(公告)号：WO2006131872A3
公开(公告)日：2008-03-13
申请号：PCT/IB2006051780
申请日：2006-06-02
Inventor： SCHOMBERG HERMANN
CPC classification number: G06T11/006 , G06T2207/10081 , G06T2211/421
Abstract: A fast reconstruction algorithm for cone-beam computed tomography is presented. The algorithm is of the filtered backprojection type and uses nonuniform fast Fourier transforms to switch between functions defined and uniformly sampled on the detector plane and the Fourier transforms of these functions, sampled on a polar grid in the associated Fourier plane.
Abstract translation: 提出了锥束计算机断层扫描的快速重建算法。 该算法是滤波反投影类型，并且使用非均匀快速傅里叶变换来在检测器平面上定义和均匀采样的函数和这些函数的傅立叶变换之间切换，在相关联的傅立叶平面中的极坐标网格上采样。
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