公开(公告)号：WO2007004196A3

公开(公告)日：2007-05-03

申请号：PCT/IB2006052248

申请日：2006-07-04

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  KOEHLER THOMAS ,  BONTUS CLAAS ,  PROKSA ROLAND

Inventor： KOEHLER THOMAS ,  BONTUS CLAAS ,  PROKSA ROLAND

IPC: A61B6/03 ,  G01N23/04 ,  G06T11/00

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  G06T11/006 ,  G06T2211/416 ,  G06T2211/421

Abstract: Exact methods of FBP reconstruction may have the restriction that the object point to be reconstructed and the first and last source position used for back- projection must lie on a line. According to an exemplary embodiment of the present invention, a method of FBP reconstruction is provided, comprising a filtering of the projection data along a projected M-line and a back-projecting of the filtered projection data over an interval larger than the PI interval of the object point. This may provide for an exact FBP type algorithm for arbitrary trajectories.

Abstract translation: FBP重建的精确方法可能具有要重构的对象点的限制，并且用于反投影的第一和最后一个源位置必须位于一行上。 根据本发明的示例性实施例，提供了一种FBP重构的方法，包括沿着投影M线对投影数据进行滤波，并且在大于PI间隔的间隔上对经过滤的投影数据进行反投影 对象点。 这可以为任意轨迹提供精确的FBP类型算法。

公开(公告)号：WO2004075106A3

公开(公告)日：2005-03-10

申请号：PCT/IB2004000346

申请日：2004-02-11

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  BONTUS CLAAS ,  KOEHLER THOMAS

Inventor： BONTUS CLAAS ,  KOEHLER THOMAS

IPC: G06T20060101 ,  G06T1/00 ,  G06T11/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  G06T2211/421

Abstract: The invention relates to a computerized tomography method, in which an examination area is scanned radiographically along a helical trajectory by a conical beam. The radiation transmitted through the examination area is measured by means of a detector unit, wherein the absorption distribution in the examination area is reconstructed exactly or at least quasi-exactly from these measured values. Reconstruction uses redundant measured values and comprises derivation of the measured values from parallel rays of different projections, integration of these values along kappa -lines, weighting of these values and back-projection.

Abstract translation: 本发明涉及一种计算机断层摄影方法，其中通过锥形光束沿着螺旋轨迹对X射线照相检查区域进行扫描。 透过检查区域的辐射通过检测器单元测量，其中检查区域中的吸收分布被准确地或至少准确地从这些测量值重建。 重构使用冗余的测量值，并且包括从不同投影的平行光线导出的测量值，这些值沿着kappa线的积分，这些值的加权和反投影。

公开(公告)号：WO2009066201A2

公开(公告)日：2009-05-28

申请号：PCT/IB2008054711

申请日：2008-11-11

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  BONTUS CLAAS

Inventor： BONTUS CLAAS

CPC classification number: G01T1/2985 ,  A61B6/027

Abstract: The present invention relates to an imaging apparatus for determining an image of a region of interest, wherein a motion generation unit (1, 7, 8) moves the radiation source (2) and a region of interest relative to each other along a first trajectory (32), while a detection unit (6) detects first detection data. A reconstruction data determination unit (12) determines reconstruction data among the first detection data and a second trajectory determination unit (13) determines a second trajectory (32) depending on the reconstruction data. After that the motion generation unit (1, 7, 8) moves the radiation source (2) and the region of interest relative to each other along the second trajectory (32), while the detection unit (6) detects second detection data. The reconstruction data and the second detection data are used by a reconstruction unit (14) for reconstructing an image of the region of interest.

Abstract translation: 本发明涉及一种用于确定感兴趣区域的图像的成像装置，其中运动生成单元（1,7,8）沿着第一轨迹移动辐射源（2）和相对于彼此的感兴趣区域 （32），而检测单元（6）检测第一检测数据。 重建数据确定单元（12）确定第一检测数据之间的重建数据，第二轨迹确定单元（13）根据重建数据确定第二轨迹（32）。 之后，当检测单元（6）检测到第二检测数据时，运动生成单元（1,7,8）沿着第二轨迹（32）移动辐射源（2）和相对于彼此的感兴趣区域。 重建数据和第二检测数据由重建单元（14）用于重建感兴趣区域的图像。

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

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  SHECHTER GILAD ,  GLASBERG SHMUEL ,  VAN STEVENDAAL UDO ,  FORTHMANN PETER ,  KOEHLER THOMAS ,  BONTUS CLAAS

Inventor： SHECHTER GILAD ,  GLASBERG SHMUEL ,  VAN STEVENDAAL UDO ,  FORTHMANN PETER ,  KOEHLER THOMAS ,  BONTUS CLAAS

IPC: A61B6/06

CPC classification number: A61B6/06

Abstract: 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).

Abstract translation: 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）。

公开(公告)号：WO2005091216A2

公开(公告)日：2005-09-29

申请号：PCT/IB2005050824

申请日：2005-03-07

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  KOEHLER THOMAS ,  BONTUS CLAAS

Inventor： KOEHLER THOMAS ,  BONTUS CLAAS

IPC: G01T1/164 ,  G06T5/00 ,  G06T11/00

CPC classification number: G06T11/005 ,  G01T1/1647 ,  Y10S378/901

Abstract: Image quality is an important feature for CT scanning, in particular for helical cone-beam CT scanning. By using projection data acquired at two different positions of the focal spot of the radiation beam and rebinning that projection data from a first geometry to a second geometry the two sub-sets of projection data are combined to one rebinned projection data set, thereby improving the radial resolution of the data set. Advantageously, according to an aspect of the present invention, a further rebinning may be performed, from the second geometry back to the first geometry, therefore resulting in a projection data set in the initial geometry with a higher radial resolution.

Abstract translation: 图像质量是CT扫描的重要特征，特别是螺旋锥束CT扫描。 通过使用在辐射束的焦斑的两个不同位置处获取的投影数据，并将投影数据从第一几何重新组合到第二几何形状，将两个投影数据子集组合成一个重新投影的投影数据集，从而改善 数据集的径向分辨率。 有利地，根据本发明的一个方面，可以从第二几何体到第一几何形状进行进一步的重新组合，因此导致在初始几何形状中以更高的径向分辨率设置的投影数据。

公开(公告)号：WO2005023114A2

公开(公告)日：2005-03-17

申请号：PCT/IB2004051523

申请日：2004-08-23

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  BONTUS CLAAS ,  KOEHLER THOMAS ,  GRASS MICHAEL

Inventor： BONTUS CLAAS ,  KOEHLER THOMAS ,  GRASS MICHAEL

IPC: A61B6/00 ,  A61B6/03 ,  G06T11/00

CPC classification number: A61B6/5217 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/5264 ,  A61B6/527 ,  A61B6/541 ,  G06T11/005 ,  G06T11/006 ,  G06T2211/412

Abstract: The invention relates to a computer tomography method in which an examination area is passed through by a cone-shaped bundle of rays. The bundle of rays comes from a radiation source location which moves around the examination area on an overall trajectory. The overall trajectory consists of a first, closed partial trajectory, at least one second, closed partial trajectory and at least one third partial trajectory which connects the first and the at least one second partial trajectories to one another. Measured values which depend on the intensity in the bundle of rays on the other side of the examination area are acquired by means of a detector unit while the radiation source location is moving on the overall trajectory, and a CT image of the examination area is reconstructed from these measured values.

Abstract translation: 本发明涉及一种计算机断层摄影方法，其中检查区域通过锥形射线束。 射线束来自辐射源位置，其在整个轨迹上围绕检查区域移动。 整个轨迹由第一闭合部分轨迹，至少一个第二闭合部分轨迹以及将第一部分轨迹和至少一个第二部分轨迹彼此连接的至少一个第三部分轨迹组成。 在辐射源位置在整个轨迹上移动的同时，借助于检测器单元获取取决于检查区域的另一侧的光线束中的强度的测量值，并且重建检查区域的CT图像 从这些测量值。

公开(公告)号：WO2008084413A3

公开(公告)日：2009-06-18

申请号：PCT/IB2008050002

申请日：2008-01-02

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  BONTUS CLAAS ,  GRASS MICHAEL ,  SCHIRRA CARSTEN O ,  VAN STEVENDAAL UDO ,  LAVI GUY

Inventor： BONTUS CLAAS ,  GRASS MICHAEL ,  SCHIRRA CARSTEN O ,  VAN STEVENDAAL UDO ,  LAVI GUY

IPC: G06T7/20

CPC classification number: G06T7/20 ,  A61B5/0402 ,  A61B6/027 ,  A61B6/032 ,  A61B6/469 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541

Abstract: The invention relates to an imaging system for imaging a region of interest comprising a moving object, which moves less in small motion phases than in large motion phases. Detection values are provided and a small motion determination unit (15) determines the motion of the object in the region of interest in the small motion phases from the 5 detection values. A large motion determination unit (16) determines the motion of the object in the large motion phases from the determined motion of the object in the small motion phases. A reconstruction unit (17) reconstructs an image of the region of interest from the detection values, wherein the reconstruction unit (17) is adapted for performing a motion compensation using the determined motions in the small and large motion phases.

Abstract translation: 本发明涉及一种用于对感兴趣的区域成像的成像系统，该成像系统包括移动物体，该运动物体在小运动相位上比在大运动相位中运动较少。 提供检测值，并且小运动确定单元（15）从5个检测值确定在小运动相位中的感兴趣区域中的对象的运动。 大运动确定单元（16）根据所确定的小运动阶段中的物体的运动来确定物体在大运动相位中的运动。 重建单元（17）从检测值重建感兴趣区域的图像，其中重建单元（17）适于使用在小的和大的运动阶段中确定的运动来执行运动补偿。

公开(公告)号：WO2008026153A3

公开(公告)日：2008-07-17

申请号：PCT/IB2007053442

申请日：2007-08-28

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  BONTUS CLAAS ,  GRASS MICHAEL ,  KOEHLER THOMAS

Inventor： BONTUS CLAAS ,  GRASS MICHAEL ,  KOEHLER THOMAS

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027

Abstract: The present invention relates to an imaging system for imaging a field of interest, in particular to a computed tomography system. The imaging system comprises an irradiation unit (2) which moves relative to a field of interest along a first trajectory (501) and along a second trajectory (503). While the irradiation unit (2) moves along the first trajectory (501), first detection data are acquired and, while the irradiation unit (2) moves along the second trajectory (503), second detection data are acquired. An intermediate image of the field of interest is reconstructed from at least the second detection data, and virtual detection data are determined by forward projection through the intermediate image. Finally, an image of the field of interest is reconstructed from the first detection data and the virtual detection data.

Abstract translation: 本发明涉及一种用于对感兴趣的区域成像的成像系统，具体涉及一种计算机断层摄影系统。 该成像系统包括照射单元（2），其沿着第一轨迹（501）并且沿着第二轨迹（503）相对于感兴趣的区域移动。 在照射单元（2）沿着第一轨道（501）移动期间，获取第一检测数据，并且在照射单元（2）沿着第二轨迹（503）移动的同时获取第二检测数据。 至少从第二检测数据重构感兴趣区域的中间图像，并且通过经由中间图像的前向投影来确定虚拟检测数据。 最后，根据第一检测数据和虚拟检测数据重建感兴趣区域的图像。

公开(公告)号：WO2006090323A3

公开(公告)日：2006-11-09

申请号：PCT/IB2006050546

申请日：2006-02-20

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  BONTUS CLAAS

Inventor： BONTUS CLAAS

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4488 ,  G01N23/046 ,  G01N2223/419

Abstract: A computer tomography apparatus (100) for examination of an object of interest (107), the computer tomography apparatus (100) comprising a first electromagnetic radiation source (104) adapted to emit electromagnetic radiation to an object of interest (107), a second electromagnetic radiation source (203) adapted to emit electromagnetic radiation to the object of interest (107), at least one detecting device (108) adapted to detect electromagnetic radiation generated by the first electromagnetic radiation source (104) and by the second electromagnetic radiation source (203) and scattered on the object of interest (107), and a determination unit (118) adapted to determine structural information concerning the object of interest (107) based on an analysis of detecting signals received from the at least one detecting device (108).

Abstract translation: 一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），所述计算机断层摄影装置（100）包括适于向感兴趣对象（107）发射电磁辐射的第一电磁辐射源（104），第二 适于向感兴趣物体（107）发射电磁辐射的电磁辐射源（203），适于检测由第一电磁辐射源（104）产生的电磁辐射的第一电磁辐射源 （203）并分散在感兴趣对象（107）上，以及确定单元（118），用于基于从至少一个检测设备接收的检测信号的分析来确定关于感兴趣对象（107）的结构信息（107） 108）。

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

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  VAN STEVENDAAL UDO ,  BONTUS CLAAS ,  FORTHMANN PETER

Inventor： VAN STEVENDAAL UDO ,  BONTUS CLAAS ,  FORTHMANN PETER

IPC: G06T11/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  Y10S378/901

Abstract: 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.

Abstract translation: 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。