Three-dimensional energy distribution device
    2.
    发明授权
    Three-dimensional energy distribution device 失效
    三维能量分配装置

    公开(公告)号:US5595767A

    公开(公告)日:1997-01-21

    申请号:US313062

    申请日:1994-11-23

    CPC分类号: G09G3/003

    摘要: A three-dimensional energy distribution device includes a volume reacting to the energy of a predetermined radiation; a plurality of sources of the radiation illuminating the volume according to respective angles; and, placed between each source and the volume, a support that is transparent to the radiation and that includes an image corresponding to a density projection of a real or virtual object examined at the angle the respective source illuminates the volume, the projection having been subjected to an image correction process.

    摘要翻译: PCT No.PCT / FR93 / 00286 Sec。 371日期1994年11月23日 102(e)日期1994年11月23日PCT 1993年3月23日PCT公布。 出版物WO93 / 20528 日期:1993年10月14日三维能量分配装置包括与预定辐射能量反应的体积; 多个辐射源照射各个角度的体积; 并且放置在每个源和体积之间,对辐射透明的支撑件,其包括对应于以相应的源照亮体积的角度检查的实际或虚拟物体的密度投影的图像,所述投影已经受到 到图像校正处理。

    Determination of the position of a radiographic or radioscopic unit
    3.
    发明申请
    Determination of the position of a radiographic or radioscopic unit 有权
    确定射线照相或放射线检查单元的位置

    公开(公告)号:US20060155189A1

    公开(公告)日:2006-07-13

    申请号:US10518724

    申请日:2003-06-20

    IPC分类号: A61B5/05

    摘要: The invention relates to a method for the determination of the position of a radiographic or radioscopic unit (16) with relation to a reference point (Rref) on producing a radiographic image of an object (10). The position of the unit (16) with relation to a reference point (Rref) is determined from the determination of the position of a test pattern (25), with relation to the unit (16), which is mechanically fixed to the object, by using the image of the test pattern with relation to the reference point (Rref). The invention further relates to a determining device for carrying out said method.

    摘要翻译: 本发明涉及一种用于在产生物体(10)的射线照相图像时确定射线照相或者放射线单元(16)相对于参考点(R SUB ref)的位置的方法。 根据测试图案(25)的位置与单元(16)的确定来确定单元(16)相对于参考点(R SUB ref)的位置, 通过使用相对于参考点(R REF)的测试图案的图像,机械地固定到对象。 本发明还涉及一种用于执行所述方法的确定装置。

    Determination of the position of a radiographic or radioscopic unit
    4.
    发明授权
    Determination of the position of a radiographic or radioscopic unit 有权
    确定射线照相或放射线检查单元的位置

    公开(公告)号:US07672709B2

    公开(公告)日:2010-03-02

    申请号:US10518724

    申请日:2003-06-20

    IPC分类号: A61B5/05

    摘要: The invention relates to a method for the determination of the position of a radiographic or radioscopic unit (16) with relation to a reference point (Rref) on producing a radiographic image of an object (10). The position of the unit (16) with relation to a reference point (Rref) is determined from the determination of the position of a test pattern (25), with relation to the unit (16), which is mechanically fixed to the object, by using the image of the test pattern with relation to the reference point (Rref). The invention further relates to a determining device for carrying out said method.

    摘要翻译: 本发明涉及一种用于在产生物体(10)的放射线照相图像时,确定相对于参考点(Rref)的射线照相或者放射线单元(16)的位置的方法。 从相对于机械地固定在物体上的单元(16)的测定图案(25)的位置的确定来确定单元(16)相对于参考点(Rref)的位置, 通过使用与参考点(Rref)相关的测试图案的图像。 本发明还涉及一种用于执行所述方法的确定装置。

    Method for accelerated reconstruction of a three-dimensional image
    5.
    发明授权
    Method for accelerated reconstruction of a three-dimensional image 失效
    加速重建三维图像的方法

    公开(公告)号:US06920240B2

    公开(公告)日:2005-07-19

    申请号:US10048336

    申请日:2001-06-07

    IPC分类号: G06T11/00 G06K9/00

    CPC分类号: G06T11/005 G06T2211/421

    摘要: Sets of projections of measurements through an object (1) the image of which is to be represented, undergo Fourier transforms before being broken down into blocks according to cutoff frequencies. The blocks are separately reconstructed in order to form a series of thumbnail images of the object, which are then combined in order to reconstruct the final image. The reconstruction calculations on the thumbnail images are rapid and often a large portion of the blocks will be discarded, notably those which are at high frequencies, whereby their contribution may frequently be neglected as well as the noise effects which accumulate therein.The invention is applied to medical or industrial tomography methods and is of larger interest for mobile objects, the movement of which may be estimated and compensated.

    摘要翻译: 通过其图像要被表示的对象(1)的测量的投影的集合在根据截止频率被分解成块之前进行傅里叶变换。 为了形成一系列的对象的缩略图,单独地重建这些块,然后将其组合以便重构最终的图像。 缩略图上的重建计算是快速的,并且通常大部分的块将被丢弃,特别是那些处于高频率的块,其中它们的贡献可能经常被忽略以及在其中积累的噪声效应。 本发明应用于医疗或工业层析成像方法,并且对移动物体具有较大的兴趣,其运动可以被估计和补偿。

    Three-dimensional statistic reconstruction of surfaces
    6.
    发明授权
    Three-dimensional statistic reconstruction of surfaces 有权
    表面三维统计重建

    公开(公告)号:US07227981B1

    公开(公告)日:2007-06-05

    申请号:US10088772

    申请日:2000-09-14

    IPC分类号: G06K9/00

    摘要: The invention concerns a method and a system for three-dimensional reconstruction of an image representing the surface contours of at least an object (1), from at least a two-dimensional view of said object obtained by X-ray, which consists in: determining the position of the photographing source (7) in a reference repository; selecting a predefined model constituting a mean form of the object, and repeating the process until the contours of the model are such that the variations between the overhead projection rays of the contours of the two-dimensional image from the source and the model surface are minimal; selecting an orientation and a position for the model in the reference repository; then selecting a deformation of the model to modify its contours in three dimensions.

    摘要翻译: 本发明涉及一种用于从至少从X射线获得的所述对象的二维视图来表示至少对象(1)的表面轮廓的图像的三维重建的方法和系统,其包括: 确定摄影源(7)在参考资料库中的位置; 选择构成对象的平均形式的预定义模型,并且重复该过程直到模型的轮廓使得来自源和模型表面的二维图像的轮廓的顶点投影射线之间的变化是最小的 ; 在参考资料库中选择模型的方向和位置; 然后选择模型的变形以在三维中修改其轮廓。

    Method for reconstructing an image from a set of projections by applying a wavelet transform
    7.
    发明申请
    Method for reconstructing an image from a set of projections by applying a wavelet transform 审中-公开
    通过应用小波变换从一组投影重建图像的方法

    公开(公告)号:US20060147097A1

    公开(公告)日:2006-07-06

    申请号:US10530854

    申请日:2003-10-14

    IPC分类号: G06K9/00

    CPC分类号: G06T11/006 G06T2211/421

    摘要: A calculation for reconstructing tomographic images involves the decomposition of two-dimensional sets of projections of this image by a wavelet decomposition method, in which the set of projections is separated into thumbnail images expressing the whole and the higher frequency details of the projections, respectively. The reconstruction is carried out separately on the thumbnail images before making a combination. Certain properties of this decomposition, notably in the Fourier frequency domain, provide substantial reduction of the amount of calculations.

    摘要翻译: 用于重建断层图像的计算涉及通过小波分解方法对该图像的二维投影集进行分解,其中将该组投影分成表示整体的缩略图和投影的较高频率细节。 在进行组合之前,在缩略图上分别进行重建。 这种分解的某些特性,特别是在傅里叶频域中,提供了大量的计算量的减少。