Methods and apparatus for high pitch helical computed tomography image reconstruction
    1.
    发明授权
    Methods and apparatus for high pitch helical computed tomography image reconstruction 失效
    高螺距螺旋计算机断层扫描图像重建方法与装置

    公开(公告)号:US06490334B1

    公开(公告)日:2002-12-03

    申请号:US09896957

    申请日:2001-06-29

    IPC分类号: A61B603

    摘要: There is therefore provided, in one aspect, a method for imaging an object utilizing a computed tomographic (CT) imaging system having a rotating gantry, a multislice detector array on the rotating gantry and using at least n>1 rows of detector channels, and a radiation source on the rotating gantry configured to project a beam of radiation towards the multislice detector array through an object to be imaged. The method includes helically scanning the object with the CT imaging system at a pitch p>n to acquire projection data from the n rows of detector channels; applying a combined helical weight and conjugate weight to at least a portion of the acquired projection data to produce virtual projection data compensating for incomplete helical row data of the acquired projection data; and reconstructing an image of the object utilizing the acquired projection data and the virtual projection data.

    摘要翻译: 因此,在一个方面中,提供一种利用具有旋转机架的计算机断层摄影(CT)成像系统对成像进行成像的方法,在旋转机架上使用多层检测器阵列并且至少使用n> 1行检测器通道,以及 旋转台架上的辐射源被配置成通过待成像的物体将辐射束投射到多层检测器阵列。 该方法包括用间距p> n的CT成像系统螺旋扫描物体,以从n行检测器通道获取投影数据; 对所获取的投影数据的至少一部分应用组合的螺旋重量和共轭权重,以产生补偿所获取的投影数据的不完整螺旋行数据的虚拟投影数据; 以及使用所获取的投影数据和虚拟投影数据来重建对象的图像。

    Methods and apparatus for reconstructing an image of an object
    2.
    发明授权
    Methods and apparatus for reconstructing an image of an object 失效
    用于重建物体的图像的方法和装置

    公开(公告)号:US07013034B2

    公开(公告)日:2006-03-14

    申请号:US10268323

    申请日:2002-10-10

    IPC分类号: G06K9/00

    摘要: A method for reconstructing an image of an object utilizing a computed tomographic (CT) imaging system having a radiation source configured to project a beam of radiation through an object and towards a multislice detector array configured to sense attenuation of the radiation passing through the object; the method includes helically scanning an object to acquire a plurality of slices of projection data, generating a separate projection dataset for each of N separate detector rows wherein the separate projection datasets include detector row projection data and detector row conjugate projection data, combining the detector row projection data and the detector row conjugate projection data, and helically weighting the combined projection data using a combined helical weighting and conjugate data weighting algorithm such that a greater weight is applied to combined center row projection data than to at least one outermost detector row projection data.

    摘要翻译: 一种用于使用计算机断层摄影(CT)成像系统来重建物体的图像的方法,所述计算机断层摄影(CT)成像系统具有被配置成将辐射束投射穿过物体并朝向被配置为感测穿过物体的辐射的衰减的多层检测器阵列投影的辐射源; 该方法包括螺旋扫描对象以获取多个投影数据片段,为N个单独检测器行中的每一个生成单独的投影数据集,其中分离的投影数据集包括检测器行投影数据和检测器行共轭投影数据,组合检测器行 投影数据和检测器行共轭投影数据,并且使用组合的螺旋加权和共轭数据加权算法对组合的投影数据进行螺旋加权,使得对组合的中心行投影数据施加更大的权重,而不是至少一个最外检测器行投影数据 。

    High Speed Z-smoothing method and apparatus for CT imaging system
    3.
    发明授权
    High Speed Z-smoothing method and apparatus for CT imaging system 失效
    用于CT成像系统的高速Z平滑方法和装置

    公开(公告)号:US06885764B2

    公开(公告)日:2005-04-26

    申请号:US09990979

    申请日:2001-11-21

    IPC分类号: A61B6/03 G06T11/00 G06K9/00

    摘要: A method and apparatus for quickly rendering thick CT slice images wherein the data corresponding to an optimal number of slice images to be combined to generate a thick image and the data set required to generate the thick image are determined as a function of an optimal Z-smoothing factor and wherein Z-smoothing is implemented in software that performs quickly and is useable with any helical weighting algorithm and Z-smoothing function.

    摘要翻译: 一种用于快速渲染厚CT图像的方法和装置,其中对应于要被组合以产生厚图像的切片图像的最佳数量的数据和生成厚图像所需的数据集被确定为最佳Z- 平滑因子,并且其中Z平滑化在快速执行并且可用于任何螺旋加权算法和Z平滑功能的软件中实现。

    Row-wise full helical view weighting method and apparatus for CT scanners
    4.
    发明授权
    Row-wise full helical view weighting method and apparatus for CT scanners 失效
    横向全螺旋视图加权方法和CT扫描仪的设备

    公开(公告)号:US06522714B1

    公开(公告)日:2003-02-18

    申请号:US10037032

    申请日:2001-11-09

    IPC分类号: A61B603

    摘要: A method and apparatus for performing image reconstruction using data obtained by an N beam helical scan, the method including generating projection data arrays for each of the N row in a CT detector, weighting the data arrays using a unique weighting function that is applicable to detectors having many different numbers of rows N to generate helical weighted arrays for each row, weighting the helical weighted arrays by applying a conjugate weighting function to generate conjugate arrays for each detector row and then combining the conjugate weighted arrays, filtering and back-projecting to generate a slice image.

    摘要翻译: 一种用于使用通过N波束螺旋扫描获得的数据进行图像重建的方法和装置,所述方法包括为CT检测器中的N行中的每一个生成投影数据阵列,使用适用于检测器的唯一加权函数对数据阵列进行加权 具有许多不同数量的行N以产生每行的螺旋加权阵列,通过应用共轭加权函数对每个检测器行产生共轭阵列,然后组合共轭加权阵列,进行滤波和反投影来加权螺旋加权阵列,以产生 切片图像。