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    • 3. 发明申请
    • Reconstruction of 3D image datasets from x-ray and cone-beam data
    • 从X射线和锥束数据重建3D图像数据集
    • US20110085637A1
    • 2011-04-14
    • US12902237
    • 2010-10-12
    • Jan BoeseFrank DennerleinHolger Kunze
    • Jan BoeseFrank DennerleinHolger Kunze
    • A61B6/03G06T17/00
    • G06T11/006A61B6/027
    • A method for producing a 3D image dataset of an object with an imaging system having an x-ray source and an x-ray detector is provided. A series of two-dimensional arrays of cone beam data from the detector is acquired while the source moves along a substantially planar trajectory around the object. The trajectory is described by a series of source points serially numbered by a counter parameter. The cone beam data is differentiated with respect to the counter parameter at a fixed ray direction to produce a derivative of the cone beam data. The derivative is filtered with a Hilbert-like filter to produce filtered cone beam data. The acquired or the filtered cone beam data is multiplied with a redundancy weighting function. The cone beam data is back-projected to reconstruct a 3D image dataset.
    • 提供了一种使用具有X射线源和X射线检测器的成像系统来生成物体的3D图像数据集的方法。 来自检测器的一系列锥形束数据的二维阵列被获取,同时源沿着物体周围的基本上平面的轨迹移动。 轨迹由一系列通过计数器参数串行编号的源点描述。 锥形束数据在固定的射线方向上相对于计数器参数微分,以产生锥形束数据的导数。 用希尔伯特滤波器滤波导数,以产生滤波的锥束数据。 所获取的或经滤波的锥束数据与冗余加权函数相乘。 锥形束数据被反投影以重建3D图像数据集。
    • 6. 发明授权
    • Reconstruction of 3D image datasets from x-ray and cone-beam data
    • 从X射线和锥束数据重建3D图像数据集
    • US08218717B2
    • 2012-07-10
    • US12902237
    • 2010-10-12
    • Jan BoeseFrank DennerleinHolger Kunze
    • Jan BoeseFrank DennerleinHolger Kunze
    • A61B6/00
    • G06T11/006A61B6/027
    • A method for producing a 3D image dataset of an object with an imaging system having an x-ray source and an x-ray detector is provided. A series of two-dimensional arrays of cone beam data from the detector is acquired while the source moves along a substantially planar trajectory around the object. The trajectory is described by a series of source points serially numbered by a counter parameter. The cone beam data is differentiated with respect to the counter parameter at a fixed ray direction to produce a derivative of the cone beam data. The derivative is filtered with a Hilbert-like filter to produce filtered cone beam data. The acquired or the filtered cone beam data is multiplied with a redundancy weighting function. The cone beam data is back-projected to reconstruct a 3D image dataset.
    • 提供了一种使用具有X射线源和X射线检测器的成像系统来生成物体的3D图像数据集的方法。 来自检测器的一系列锥形束数据的二维阵列被获取,同时源沿着围绕物体的基本上平面的轨迹移动。 轨迹由一系列通过计数器参数串行编号的源点描述。 锥形束数据在固定的射线方向上相对于计数器参数微分,以产生锥形束数据的导数。 用希尔伯特滤波器滤波导数,以产生滤波的锥束数据。 所获取的或经滤波的锥束数据与冗余加权函数相乘。 锥形束数据被反投影以重建3D图像数据集。
    • 8. 发明授权
    • Method for determining an imaging rule and method for generating a 3D reconstruction
    • 用于确定用于生成3D重建的成像规则和方法的方法
    • US08043003B2
    • 2011-10-25
    • US12231664
    • 2008-09-04
    • Florian VogtHolger KunzeBenno Heigl
    • Florian VogtHolger KunzeBenno Heigl
    • A61B6/03
    • G01N23/046A61B6/583G01N2223/419
    • It is possible that at a predetermined position of the imaging components of a radiographic imaging system the object is not fully viewed. The object can be a calibration phantom, which means that it is not possible to directly determine an imaging rule with the aid of the calibration phantom at this position of the imaging components. According to the invention, an imaging of the calibration phantom at a different position takes place and an imaging rule for this position is determined. This is then converted, provided a movement parameter is known which describes the movement from the position with the record of the calibration phantom to a different position. The imaging rule obtained in this way can be further improved, e.g. with the aid of a recording of the calibration phantom from the position in question, including if the calibration phantom is not completely imaged.
    • 可能的是,在放射线照相成像系统的成像部件的预定位置处,物体未被完全观察。 对象可以是校准体模,这意味着不可能借助于成像部件的该位置处的校准模型来直接确定成像规则。 根据本发明,发生在不同位置处的校准体模的成像,并确定该位置的成像规则。 只要已知运动参数描述从具有校准体模记录的位置到不同位置的运动,则将其转换。 以这种方式获得的成像规则可以进一步改进,例如。 借助于来自所讨论的位置的校准体模的记录,包括如果校准体模不完全成像。
    • 9. 发明申请
    • Method for determining an imaging rule and method for generating a 3D reconstruction
    • 用于确定用于生成3D重建的成像规则和方法的方法
    • US20090067583A1
    • 2009-03-12
    • US12231664
    • 2008-09-04
    • Florian VogtHolger KunzeBenno Heigl
    • Florian VogtHolger KunzeBenno Heigl
    • G01D18/00
    • G01N23/046A61B6/583G01N2223/419
    • It is possible that at a predetermined position of the imaging components of a radiographic imaging system the object is not fully viewed. The object can be a calibration phantom, which means that it is not possible to directly determine an imaging rule with the aid of the calibration phantom at this position of the imaging components. According to the invention, an imaging of the calibration phantom at a different position takes place and an imaging rule for this position is determined. This is then converted, provided a movement parameter is known which describes the movement from the position with the record of the calibration phantom to a different position. The imaging rule obtained in this way can be further improved, e.g. with the aid of a recording of the calibration phantom from the position in question, including if the calibration phantom is not completely imaged.
    • 可能的是,在放射线照相成像系统的成像部件的预定位置处,物体未被完全观察。 对象可以是校准体模,这意味着不可能借助于成像部件的该位置处的校准模型来直接确定成像规则。 根据本发明,发生在不同位置处的校准体模的成像,并确定该位置的成像规则。 只要已知运动参数描述从具有校准体模记录的位置到不同位置的运动,则将其转换。 以这种方式获得的成像规则可以进一步改进,例如。 借助于来自所讨论的位置的校准体模的记录,包括如果校准体模不完全成像。
    • 10. 发明授权
    • Method for generating a 3D reconstruction of a body
    • 用于生成身体的3D重建的方法
    • US07742557B2
    • 2010-06-22
    • US12156932
    • 2008-06-05
    • Thomas BrunnerBenno HeiglHolger KunzeFlorian Vogt
    • Thomas BrunnerBenno HeiglHolger KunzeFlorian Vogt
    • A61B6/00
    • G01N23/046A61B6/03G01N2223/419G06T11/006G06T2211/421G06T2211/432
    • The invention relates to a method for generating a 3D reconstruction of an especially large body that cannot be captured by a single projection by capturing at least two projections, which together capture the body, at each of the positions taken up by a C-arm X-ray unit. Data from the two projections is projected onto a virtual detector and the data from the virtual detector is then used for the filtered back projection procedure. It is assumed here that the real source remains motionless and that only the detector moves. A virtual detector D1′/D2′ is only used in order to carry out large scale filtering in the event that real sources Q1 and Q2 for the two projections do not coincide. A return is then made to two independent projections. These two independent projections are used separately in the filtered back projection procedure to generate the 3D reconstruction.
    • 本发明涉及一种用于产生特别大的身体的3D重建的方法,其不能被单个投影捕获,通过在由C形臂X牵引的每个位置处捕获至少两个突起(它们一起俘获身体) 射线单位 来自两个投影的数据被投影到虚拟检测器上,然后将来自虚拟检测器的数据用于滤波反投影过程。 这里假定实际的源保持不动,只有检测器移动。 只有在两个投影的实际源Q1和Q2不一致的情况下,才使用虚拟检测器D1'/ D2'来执行大规模滤波。 然后返回到两个独立的投影。 这两个独立的投影在经滤波的反投影过程中单独使用以产生3D重建。