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353 条记录 (耗时 0.034 秒)

    CT image reconstruction through employment of function that describes interpreted movement of source around particular point of object
    92.
    发明授权
    CT image reconstruction through employment of function that describes interpreted movement of source around particular point of object 有权
    通过使用功能描述CT图像重建，其描述围绕特定物体点的源的解释移动

    公开(公告)号：US07376213B1

    公开(公告)日：2008-05-20

    申请号：US11276301

    申请日：2006-02-23

    申请人： Yuchuan Wei ,  Jiang Hsieh ,  Ge Wang

    发明人： Yuchuan Wei ,  Jiang Hsieh ,  Ge Wang

    IPC分类号： G01N23/00

    CPC分类号： G01T1/2985 ,  A61B6/027 ,  A61B6/032 ,  G06T11/006 ,  G06T2211/412

    摘要： A CT system in an example comprises an x-ray source, a detector, a data acquisition system (DAS), and a computer. The x-ray source emits a beam of x-rays toward an object to be imaged. The detector receives x-rays emitted by the x-ray source. The DAS is operably connected to the detector. The computer is operably connected to the DAS. The computer is programmed to reconstruct a CT image of the object to comprise a plurality of CT images, of a respective plurality of points of the object, through employment of a function that describes how many times a trajectory curve, of an interpretation of relative movement between the x-ray source and the object as that of the x-ray source, goes around each of the plurality of points of the object.

    摘要翻译： 示例中的CT系统包括x射线源，检测器，数据采集系统（DAS）和计算机。 x射线源向待成像的物体发射一束x射线。 检测器接收x射线源发射的X射线。 DAS可操作地连接到检测器。 计算机可操作地连接到DAS。 计算机被编程为通过使用描述相对运动的解释的轨迹曲线的函数的函数来重构对象的CT图像以包括对象的相应多个点的多个CT图像 在X射线源和与X射线源的对象之间，绕过物体的多个点中的每一个。

    SYSTEMS, METHODS AND APPARATUS FOR SPECIALIZED FILTERED BACK-PROJECTION RECONSTRUCTION FOR DIGITAL TOMOSYNTHESIS
    93.
    发明申请
    SYSTEMS, METHODS AND APPARATUS FOR SPECIALIZED FILTERED BACK-PROJECTION RECONSTRUCTION FOR DIGITAL TOMOSYNTHESIS 有权
    用于数字化硅胶的专用过滤后置投影重建的系统，方法和装置

    公开(公告)号：US20080107324A1

    公开(公告)日：2008-05-08

    申请号：US11950418

    申请日：2007-12-04

    申请人： Jiang Hsieh ,  Stephen Metz ,  Gopal Avinash ,  Baojun Li ,  John Sabol

    发明人： Jiang Hsieh ,  Stephen Metz ,  Gopal Avinash ,  Baojun Li ,  John Sabol

    IPC分类号： G06K9/00

    CPC分类号： G06T11/005 ,  G06T2211/424 ,  G06T2211/436

    摘要： Systems, methods and apparatus are provided through which in one aspect, a three-dimensional (3D) image of an object is constructed from a plurality of two-dimensional (2D) images of the object using a specialized filter. In some embodiments, the specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. In some embodiments, the 3D image is back-projected from the filtered two-dimensional images, yielding a 3D image that has improved visual distinction of overlapping anatomic structures and reduced blurring.

    摘要翻译： 提供了一种系统，方法和装置，通过该系统，方法和装置，在一个方面，使用专用滤波器从对象的多个二维（2D）图像构建对象的三维（3D）图像。 在一些实施例中，专用滤波器实现线性斜坡函数，加窗函数和/或多项式函数。 在一些实施例中，3D图像从经过滤的二维图像反投影，产生3D重建解剖结构改善的视觉区别并减少模糊。

    Systems and methods for compensating for table sag
    94.
    发明授权
    Systems and methods for compensating for table sag 有权
    用于补偿工作台下垂的系统和方法

    公开(公告)号：US07344306B2

    公开(公告)日：2008-03-18

    申请号：US11172067

    申请日：2005-06-30

    申请人： Jiang Hsieh ,  Richard Zane DeLoach

    发明人： Jiang Hsieh ,  Richard Zane DeLoach

    IPC分类号： G01D18/00

    CPC分类号： A61B6/032 ,  A61B6/037 ,  A61B6/04 ,  A61B6/5276

    摘要： A method for compensating for table sag is described. The method includes receiving a first dimension of a table, scanning a patient placed on the table to obtain a first data set, generating an image of the table by performing the scanning with the patient on the table, and determining a difference between the first dimension and a second dimension of the table in the image.

    摘要翻译： 描述了一种用于补偿工作台下垂的方法。 该方法包括：接收桌子的第一维度，扫描放置在桌子上的患者以获得第一数据集，通过与患者在桌子上执行扫描来生成桌子的图像，以及确定第一维度之间的差异 以及图像中的表的第二维度。

    Methods and apparatus for truncation compensation
    97.
    发明授权
    Methods and apparatus for truncation compensation 失效
    截肢补偿的方法和装置

    公开(公告)号：US07254259B2

    公开(公告)日：2007-08-07

    申请号：US10615411

    申请日：2003-07-03

    申请人： Jiang Hsieh ,  Brian Grekowicz ,  Edward Henry Chao ,  Scott Matt McOlash ,  Amy Lynn Horst

    发明人： Jiang Hsieh ,  Brian Grekowicz ,  Edward Henry Chao ,  Scott Matt McOlash ,  Amy Lynn Horst

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/583

    摘要： A method includes calculating a sum of all samples at each projection view of a scan of an object, determining a maximum value of the calculated sums, averaging a plurality of samples m at a projection view index k when the sum of all samples at index k is less than a predetermined percentage of the maximum value, comparing the average to a threshold t, determining the projection truncated when the average is greater than t, and determining the projection not truncated when the average is not greater than t.

    摘要翻译： 一种方法包括：计算对象扫描的每个投影视图处的所有样本的总和，确定所计算出的和的最大值，在索引k处的所有样本的和之间以投影视图索引k平均多个样本m 小于最大值的预定百分比，将平均值与阈值t进行比较，确定当平均值大于t时截断的投影，以及当平均值不大于t时确定投影未被截断。

    Method and apparatus for field-of-view expansion of volumetric CT imaging
    100.
    发明申请
    Method and apparatus for field-of-view expansion of volumetric CT imaging 有权
    体积CT成像的视野展开方法和装置

    公开(公告)号：US20070116344A1

    公开(公告)日：2007-05-24

    申请号：US11286919

    申请日：2005-11-23

    申请人： Jiang Hsieh ,  Albert Henry Lonn ,  Mark Nyka

    发明人： Jiang Hsieh ,  Albert Henry Lonn ,  Mark Nyka

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/4085 ,  A61B6/5235 ,  A61B6/583 ,  G06T11/005 ,  G06T2211/432

    摘要： A method for expanding a field-of-view of a volumetric computed tomography scan comprises identifying truncated views having projection truncation and non-truncated views without projection truncation based on an average value of one or more edge channels. An estimated missing projection is calculated for each of the truncated views based on at least one neighboring non-truncated view. A projection profile is calculated for each of the truncated views based on the estimated missing projection, and the projection profile provides at least one of attenuation data and projection data for an area outside a field-of-view.

    摘要翻译： 用于扩展体积计算机断层摄影扫描的视野的方法包括基于一个或多个边缘通道的平均值来识别具有投影截断和非截断视图的截断视图而不进行投影截断。 基于至少一个相邻非截断视图为每个截断的视图计算估计的丢失投影。 基于估计的丢失投影，针对每个截断的视图计算投影轮廓，并且投影轮廓提供用于视场外的区域的衰减数据和投影数据中的至少一个。