Radial Adaptive Filter for Metal Artifact Correction
    3.
    发明申请
    Radial Adaptive Filter for Metal Artifact Correction 有权
    用于金属人工制品校正的径向自适应滤波器

    公开(公告)号:US20080152203A1

    公开(公告)日:2008-06-26

    申请号:US11815215

    申请日:2006-02-01

    IPC分类号: G06K9/00

    CPC分类号: G06T11/008

    摘要: A diagnostic imaging system (10) corrects metal artifact streaks (38) emanating from a metal object (36) in a tomographic image (T). A first processor (40) reduces streaks (38) caused by mild artifacts by applying an adaptive filter (82). The filter (82) is perpendicularly oriented toward the center of the metal object (36). The weight of the filter (82) is a function of the local structure tensor and the vector pointing to the metal object (36). If it is determined that the strong artifacts are present in the image, a second processor (48) applies a sinogram completed image algorithm to correct for severe artifacts in the image. The sinogram completed image and adaptively filtered image are fused to a final corrected image. In the fusion process, highly corrupted tomographic regions are replaced by the result of the sinogram completed image and the remainder is replaced by the adaptively filtered image.

    摘要翻译: 诊断成像系统(10)校正在断层图像(T)中从金属物体(36)发出的金属假象条纹(38)。 第一处理器(40)通过应用自适应滤波器(82)来减少由温和伪影引起的条纹(38)。 过滤器(82)朝向金属物体(36)的中心垂直取向。 过滤器(82)的重量是局部结构张量和指向金属物体(36)的向量的函数。 如果确定图像中存在强伪像,则第二处理器(48)施加正弦图完成图像算法以校正图像中的严重伪像。 正弦图完成图像和自适应滤波图像融合到最终校正图像。 在融合过程中,高度破坏的断层摄影区域被正弦图完成图像的结果所替代,其余部分由自适应滤波图像代替。

    Vessel tracking and tree extraction method and apparatus
    4.
    发明授权
    Vessel tracking and tree extraction method and apparatus 有权
    船舶跟踪和树提取方法和装置

    公开(公告)号:US06728566B1

    公开(公告)日:2004-04-27

    申请号:US09990521

    申请日:2001-11-21

    IPC分类号: A61B505

    摘要: Computed tomography (CT) data (28) is collected for a plurality of slices by a CT scanner (10). At least a portion of the CT data is reconstructed (32) to form a volume image (34) defined by a plurality of two-dimensional image slices. At least one starting point is identified (72) within a blood vessel imaged in the three-dimensional image volume (34). The blood vessel is recursively tracked (70) to form a blood vessel representation (92).

    摘要翻译: 通过CT扫描仪(10)收集多个切片的计算机断层摄影(CT)数据(28)。 重建CT数据的至少一部分(32)以形成由多个二维图像切片定义的体积图像(34)。 在三维图像体积(34)中成像的血管内识别至少一个起始点(72)。 递归地跟踪血管(70)以形成血管表示(92)。

    Method and apparatus for semi-automatic aneurysm measurement and stent planning using volume image data
    5.
    发明授权
    Method and apparatus for semi-automatic aneurysm measurement and stent planning using volume image data 有权
    用于半自动动脉瘤测量和使用体积图像数据的支架计划的方法和装置

    公开(公告)号:US06782284B1

    公开(公告)日:2004-08-24

    申请号:US09990010

    申请日:2001-11-21

    IPC分类号: A61B505

    摘要: An apparatus for measuring parameters preparatory to a stent replacement of an aneurytic blood vessel in a patient (26) includes a computed tomography (CT) scanner (10) that acquires image data (28) corresponding to multiple two-dimensional image slices. A reconstruction processor (32) reconstructs a three-dimensional image representation (34) from the image data (28). A tracking processor (40) produces a tracked vessel (92) including at least a centerline (80) and selected vessel boundaries (86). A user interface (44) displays a rendering (242) of the image representation to an associated user (42), measures selected vascular parameters corresponding to the stent parameters (276), and graphically superimposes the measured parameters on the rendering of the image representation (270, 272).

    摘要翻译: 一种用于测量患者(26)中的支气管血管的支架置换的参数的装置,包括计算机断层摄影(CT)扫描仪(10),其获取对应于多个二维图像切片的图像数据(28)。 重建处理器(32)从图像数据(28)重建三维图像表示(34)。 跟踪处理器(40)产生包括至少中心线(80)和选择的血管边界(86)的跟踪血管(92)。 用户界面(44)将图像表示的渲染(242)显示给相关联的用户(42),测量对应于支架参数(276)的所选择的血管参数,并且将所测量的参数以图形方式叠加在图像表示 (270,272)。

    Radial adaptive filter for metal artifact correction
    6.
    发明授权
    Radial adaptive filter for metal artifact correction 有权
    用于金属伪影校正的径向自适应滤波器

    公开(公告)号:US07991243B2

    公开(公告)日:2011-08-02

    申请号:US11815215

    申请日:2006-02-01

    IPC分类号: G06K9/40 G06K9/00 A61B6/00

    CPC分类号: G06T11/008

    摘要: A diagnostic imaging system (10) corrects metal artifact streaks (38) emanating from a metal object (36) in a tomographic image (T). A first processor (40) reduces streaks (38) caused by mild artifacts by applying an adaptive filter (82). The filter (82) is perpendicularly oriented toward the center of the metal object (36). The weight of the filter (82) is a function of the local structure tensor and the vector pointing to the metal object (36). If it is determined that the strong artifacts are present in the image, a second processor (48) applies a sinogram completed image algorithm to correct for severe artifacts in the image. The sinogram completed image and adaptively filtered image are fused to a final corrected image. In the fusion process, highly corrupted tomographic regions are replaced by the result of the sinogram completed image and the remainder is replaced by the adaptively filtered image.

    摘要翻译: 诊断成像系统(10)校正在断层图像(T)中从金属物体(36)发出的金属假象条纹(38)。 第一处理器(40)通过应用自适应滤波器(82)来减少由温和伪影引起的条纹(38)。 过滤器(82)朝向金属物体(36)的中心垂直取向。 过滤器(82)的重量是局部结构张量和指向金属物体(36)的矢量的函数。 如果确定图像中存在强伪像,则第二处理器(48)施加正弦图完成图像算法以校正图像中的严重伪像。 正弦图完成图像和自适应滤波图像融合到最终校正图像。 在融合过程中,高度破坏的断层摄影区域被正弦图完成图像的结果所替代,其余部分由自适应滤波图像代替。