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公开(公告)号：US10217248B2
公开(公告)日：2019-02-26
申请号：US15507077
申请日：2015-07-31
Applicant: General Electric Company
Abstract: Embodiments of the present invention disclose a method for removing streaks from detector cells with performance difference, specifically a method for removing streaks from detector cells with performance difference and streaks caused by other reasons. The method comprises: estimating a projection on a detector cell with performance difference for each of one or more views; reconstructing one or more initial images with the estimated projection on the detector cell with performance difference for each view; estimating a projection error on the detector cell with performance difference for each view from the reconstructed one or more initial images having streaks; and reconstructing one or more output images with the estimated projection error on the detector cell with performance difference for each view to remove the streaks from the reconstructed one or more output images, improving quality of CT reconstructed images.
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公开(公告)号：US10217201B2
公开(公告)日：2019-02-26
申请号：US15360569
申请日：2016-11-23
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Ming Yan , Kun Tao , Dejun Wang
Abstract: An image processing method comprises: identifying a weak edge comprising a plurality of weak edge pixels and a strong edge comprising a plurality of strong edge pixels in an input image; filtering at least a part of said input image to obtain a smoothed image, during which said weak edge in said input image is filtered with a first filter and said strong edge in said input image is filtered with a second filter having a smoothness less than that of said first filter; acquiring edge information of said input image based on said input image and said smoothed image; and generating an output image based on said edge information and said smoothed image. The present invention further relates to an image processing system and an imaging system.
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公开(公告)号：US10893839B2
公开(公告)日：2021-01-19
申请号：US16001289
申请日：2018-06-06
Applicant: General Electric Company
Inventor： Jiahua Fan , Yannan Jin , Ming Yan , Uwe Wiedmann
Abstract: A computed tomography (CT) imaging system and method, wherein the system includes an x-ray source that is operable to emit a beam of x-rays from a focal spot and move a spot position of the focal spot. The system also includes a detector assembly that is configured to detect the x-rays attenuated by the object. At least one processing unit is configured to execute programmed instructions stored in memory. The at least one processing unit is configured to direct the x-ray source to emit different beams of the x-rays at different energy levels and to receive data from the detector assembly that are representative of detection of the x-rays emitted at the different energy levels. The at least one processing unit is also configured to direct the x-ray source to move the focal spot such that the focal spot is at different spot positions while the different beams are emitted.
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公开(公告)号：US20170270640A1
公开(公告)日：2017-09-21
申请号：US15459701
申请日：2017-03-15
Applicant: General Electric Company
Inventor： Zhaoxia Zhang , Kun Tao , Hao Lai , Ming Yan , Han Kang
CPC classification number: G06T5/001 , G06K9/6212 , G06T5/10 , G06T5/20 , G06T5/50 , G06T7/13 , G06T11/60 , G06T2207/10116 , G06T2207/20221 , G06T2207/20224
Abstract: A method for reducing grid line artifacts in an X-ray image is disclosed, which includes acquiring an X-ray image by scanning an object, wherein the X-ray image comprises grid line artifacts; decomposing the X-ray image into a high frequency image and a low frequency image, wherein the high frequency image comprises the grid line artifacts; filtering the high frequency image to reduce the grid line artifacts in the high frequency image so as to obtain a filtered high frequency image; and combining the filtered high frequency image with the low frequency image to reconstruct an output image. A system adopting the above method is also disclosed.
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Patent Agency Ranking
公开(公告)号：US10373296B2
公开(公告)日：2019-08-06
申请号：US15481191
申请日：2017-04-06
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Zhaoxia Zhang , Kun Tao , Xiao Xuan , Ming Yan , Han Kang
Abstract: The present disclosure discloses a method for reducing ringing artifacts in an X-ray image, comprising: acquiring an X-ray image by scanning an object, wherein the X-ray image comprises grid line artifacts; applying a first bandwidth filter and a second bandwidth filter respectively to the X-ray image so as to obtain a filtered first image and a filtered second image, wherein the first bandwidth filter and the second bandwidth have different bandwidths; constructing a weighting map according to the X-ray image; and fusing the filtered first image and the filtered second image with the weighting map so as to obtain an output image. The present disclosure also discloses a system using the above method.
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公开(公告)号：US20170178303A1
公开(公告)日：2017-06-22
申请号：US15360569
申请日：2016-11-23
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Ming Yan , Kun Tao , Dejun Wang
CPC classification number: G06T5/20 , A61B6/00 , G06T5/002 , G06T5/50 , G06T7/0012 , G06T11/60 , G06T2207/10024 , G06T2207/10081 , G06T2207/10116 , G06T2207/20024 , G06T2207/20221 , G06T2207/20224
Abstract: An image processing method comprises: identifying a weak edge comprising a plurality of weak edge pixels and a strong edge comprising a plurality of strong edge pixels in an input image; filtering at least a part of said input image to obtain a smoothed image, during which said weak edge in said input image is filtered with a first filter and said strong edge in said input image is filtered with a second filter having a smoothness less than that of said first filter; acquiring edge information of said input image based on said input image and said smoothed image; and generating an output image based on said edge information and said smoothed image. The present invention further relates to an image processing system and an imaging system.
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公开(公告)号：US20170294001A1
公开(公告)日：2017-10-12
申请号：US15481191
申请日：2017-04-06
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Zhaoxia Zhang , Kun Tao , Xiao Xuan , Ming Yan , Han Kang
CPC classification number: G06T5/005 , G06T5/10 , G06T2207/10116
Abstract: The present disclosure discloses a method for reducing ringing artifacts in an X-ray image, comprising: acquiring an X-ray image by scanning an object, wherein the X-ray image comprises grid line artifacts; applying a first bandwidth filter and a second bandwidth filter respectively to the X-ray image so as to obtain a filtered first image and a filtered second image, wherein the first bandwidth filter and the second bandwidth have different bandwidths; constructing a weighting map according to the X-ray image; and fusing the filtered first image and the filtered second image with the weighting map so as to obtain an output image. The present disclosure also discloses a system using the above method.
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公开(公告)号：US10297010B2
公开(公告)日：2019-05-21
申请号：US15459701
申请日：2017-03-15
Applicant: General Electric Company
Inventor： Zhaoxia Zhang , Kun Tao , Hao Lai , Ming Yan , Han Kang
Abstract: A method for reducing grid line artifacts in an X-ray image is disclosed, which includes acquiring an X-ray image by scanning an object, wherein the X-ray image comprises grid line artifacts; decomposing the X-ray image into a high frequency image and a low frequency image, wherein the high frequency image comprises the grid line artifacts; filtering the high frequency image to reduce the grid line artifacts in the high frequency image so as to obtain a filtered high frequency image; and combining the filtered high frequency image with the low frequency image to reconstruct an output image. A system adopting the above method is also disclosed.
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公开(公告)号：US20170256076A1
公开(公告)日：2017-09-07
申请号：US15507077
申请日：2015-07-31
Applicant: General Electric Company
CPC classification number: G06T11/005 , A61B6/032 , A61B6/5205 , G06T7/0012 , G06T2207/10081
Abstract: Embodiments of the present invention disclose a method for removing streaks from detector cells with performance difference, specifically a method for removing streaks from detector cells with performance difference and streaks caused by other reasons. The method comprises: estimating a projection on a detector cell with performance difference for each of one or more views; reconstructing one or more initial images with the estimated projection on the detector cell with performance difference for each view; estimating a projection error on the detector cell with performance difference for each view from the reconstructed one or more initial images having streaks; and reconstructing one or more output images with the estimated projection error on the detector cell with performance difference for each view to remove the streaks from the reconstructed one or more output images, improving quality of CT reconstructed images.
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