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1. 发明申请

US20080152203A1 Radial Adaptive Filter for Metal Artifact Correction 有权
标题翻译：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
申请人： Matthieu Bal , Hasan Celik , Kai Eck , Lothar Spies , Krishna Subramanyan
发明人： Matthieu Bal , Hasan Celik , Kai Eck , Lothar Spies , Krishna Subramanyan
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。

2. 发明授权

US07991243B2 Radial adaptive filter for metal artifact correction 有权
标题翻译：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
申请人： Matthieu Bal , Hasan Celik , Kai Eck , Lothar Spies , Krishna Subramanyan
发明人： Matthieu Bal , Hasan Celik , Kai Eck , Lothar Spies , Krishna Subramanyan
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。

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