Patents by Inventor Zhicong YU
Zhicong YU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11179132Abstract: An x-ray imaging apparatus and associated methods are provided to process projection data from an offset detector during a helical scan, including view completion. The detector may be offset in the channel and/or axial direction. Projection data measured from a current view is combined with projection data measured from at least one conjugate view to reconstruct a target image. A two-dimensional aperture weighting scheme is used to address data redundancy.Type: GrantFiled: November 25, 2019Date of Patent: November 23, 2021Assignee: Accuray, Inc.Inventors: Zhicong Yu, Daniel Gagnon
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Patent number: 11182898Abstract: The present disclosure relates to systems and methods for image reconstruction. The systems may perform the methods to obtain image data, at least a portion of the image data relating to a region of interest (ROI); determine local information of the image data, the local information relating to orientation information of the image data; determine a regularization item based on the local information; and modify the image data based on the regularization item.Type: GrantFiled: February 10, 2020Date of Patent: November 23, 2021Assignee: UIH AMERICA, INC.Inventors: Zhicong Yu, Stanislav Zabic
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Patent number: 11166690Abstract: An imaging apparatus and associated methods are provided to receive measured projection data in a primary region and correct for scatter by processing the imaging data as two separate components: non-scatter-corrected data and scatter-only data. Separate image processing (e.g., reconstruction) allows for the use of individualized data processing, including filters, suited to the source data, thereby focusing on specific aspects of the source data, including, for example, noise and artifact reduction, resolution, edge preservation, etc. Combining the separately processed data results in an optimized balance of these aspects with improved image quality.Type: GrantFiled: March 19, 2020Date of Patent: November 9, 2021Assignee: Accuray, Inc.Inventors: Chuanyong Bai, Zhicong Yu, Amit Jain, Daniel Gagnon
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Patent number: 11165449Abstract: An LTE frequency band switching device and method, and a mobile terminal are provided. The device includes a power amplification module, a switching module, a duplexer, an antenna switch and an antenna. An output signal is outputted to the switching module after being amplified by the power amplification module; the switching module divides same into a plurality of frequency band signals, and selects a current working frequency band according to a switching instruction; the duplexer controls the transceiving of a working frequency band signal; and when the antenna switch is turned on, the current working frequency band signal is transceived by the antenna.Type: GrantFiled: August 9, 2018Date of Patent: November 2, 2021Assignee: JRD Communication (Shenzhen) LTD.Inventors: Hua Zhang, Zhicong Yu
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Patent number: 11160526Abstract: An x-ray imaging apparatus and associated methods are provided to receive measured projection data in a primary region and measured scatter data in a shadow region and determine an estimated scatter in the primary region during a current rotation based on the measured scatter data in the shadow region from a neighboring rotation. Coverage of the shadow region during the neighboring rotation overlaps the primary region during the current rotation. A beamformer is configured to adjust a shape of the radiation beam to create the primary and shadow regions on the detector, including an embodiment to follow the Tam-Danielson window during a helical scan.Type: GrantFiled: November 25, 2019Date of Patent: November 2, 2021Assignee: Accuray, Inc.Inventors: Zhicong Yu, Chuanyong Bai, Amit Jain, Daniel Gagnon
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Publication number: 20210290194Abstract: An imaging apparatus and associated methods are provided to receive measured projection data in a primary region and correct for scatter by processing the imaging data as two separate components: non-scatter-corrected data and scatter-only data. Separate image processing (e.g., reconstruction) allows for the use of individualized data processing, including filters, suited to the source data, thereby focusing on specific aspects of the source data, including, for example, noise and artifact reduction, resolution, edge preservation, etc. Combining the separately processed data results in an optimized balance of these aspects with improved image quality.Type: ApplicationFiled: March 19, 2020Publication date: September 23, 2021Inventors: Chuanyong Bai, Zhicong Yu, Amit Jain, Daniel Gagnon
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Publication number: 20210225046Abstract: The disclosure relates to systems and methods for iterative reconstruction. Raw data detected from a plurality of angles by an imaging device may be obtained. A first seed image may be generated by performing a filtered back projection on the raw data. A first air mask may be determined by performing a minimum value back projection (BP) on the raw data. One or more images may be reconstructed by performing an iterative reconstruction based on the first seed image, the first air mask, and the raw data.Type: ApplicationFiled: April 2, 2021Publication date: July 22, 2021Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Stanislav ZABIC, Patrick KLING, Wenjing CAO, Alexander ZAMYATIN, Zhicong YU, Haohua SUN
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Publication number: 20210212649Abstract: The present disclosure relates to systems and methods for image generation. The methods may include obtaining projection data generated by a scanner; generating, based on a first weighting function, a first image by back-projecting the projection data, the first image having a first region corresponding to a first part of the object; generating, based on a second weighting function, a second image by back-projecting the projection data, the second image having a second region corresponding to the first part of the object, the second region of the second image presenting a better CT number uniformity than the first region of the first image; and generating a third image based on the first image and the second image.Type: ApplicationFiled: March 29, 2021Publication date: July 15, 2021Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Zhicong YU, Yuan BAO, Dajun WANG, Alexander ZAMYATIN
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Patent number: 11037339Abstract: The present disclosure relates to systems and methods for reconstructing an image in an imaging system. The methods may include obtaining scan data representing an intensity distribution of energy detected at a plurality of detector elements and determining an image estimate. The methods may further include determining an objective function based on the scan data and the image estimate. The objective function may include a regularization parameter. The methods may further include iteratively updating the image estimate until the objective function satisfies a termination criterion, and for each update, updating the regularization parameter based on a gradient of an updated image estimate. The methods may further include outputting a final image based on the updated image estimate when the objective function satisfies the termination criterion.Type: GrantFiled: April 17, 2019Date of Patent: June 15, 2021Assignee: UIH AMERICA, INC.Inventors: Zhicong Yu, Stanislav Zabic
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Patent number: 10977840Abstract: The disclosure relates to systems and methods for iterative reconstruction. Raw data detected from a plurality of angles by an imaging device may be obtained. A first seed image may be generated by performing a filtered back projection on the raw data. A first air mask may be determined by performing a minimum value back projection (BP) on the raw data. One or more images may be reconstructed by performing an iterative reconstruction based on the first seed image, the first air mask, and the raw data.Type: GrantFiled: November 30, 2018Date of Patent: April 13, 2021Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Stanislav Zabic, Patrick Kling, Wenjing Cao, Alexander Zamyatin, Zhicong Yu, Haohua Sun
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Patent number: 10959695Abstract: The present disclosure relates to systems and methods for image generation. The methods may include obtaining projection data generated by a scanner; generating, based on a first weighting function, a first image by back-projecting the projection data, the first image having a first region corresponding to a first part of the object; generating, based on a second weighting function, a second image by back-projecting the projection data, the second image having a second region corresponding to the first part of the object, the second region of the second image presenting a better CT number uniformity than the first region of the first image; and generating a third image based on the first image and the second image.Type: GrantFiled: December 30, 2018Date of Patent: March 30, 2021Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Zhicong Yu, Yuan Bao, Dajun Wang, Alexander Zamyatin
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Publication number: 20200394765Abstract: Systems and methods for image noise reduction are provided. The methods may include obtaining first image data, determining a restriction or a gradient of the first image data, determining a regularization parameter for the first image data based on the restriction or the gradient, generating second image data based on the regularization parameter and the first image data, and generating a regularized image based on the second image data.Type: ApplicationFiled: August 31, 2020Publication date: December 17, 2020Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Stanislav ZABIC, Zhicong YU
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Publication number: 20200334869Abstract: The present disclosure relates to systems and methods for reconstructing an image in an imaging system. The methods may include obtaining scan data representing an intensity distribution of energy detected at a plurality of detector elements and determining an image estimate. The methods may further include determining an objective function based on the scan data and the image estimate. The objective function may include a regularization parameter. The methods may further include iteratively updating the image estimate until the objective function satisfies a termination criterion, and for each update, updating the regularization parameter based on a gradient of an updated image estimate. The methods may further include outputting a final image based on the updated image estimate when the objective function satisfies the termination criterion.Type: ApplicationFiled: April 17, 2019Publication date: October 22, 2020Applicant: UIH AMERICA, INC.Inventors: Zhicong YU, Stanislav ZABIC
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Patent number: 10762603Abstract: Systems and methods for image noise reduction are provided. The methods may include obtaining first image data, determining a restriction or a gradient of the first image data, determining a regularization parameter for the first image data based on the restriction or the gradient, generating second image data based on the regularization parameter and the first image data, and generating a regularized image based on the second image data.Type: GrantFiled: May 19, 2017Date of Patent: September 1, 2020Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.Inventors: Stanislav Zabic, Zhicong Yu
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Publication number: 20200186173Abstract: An LTE frequency band switching device and method, and a mobile terminal are provided. The device includes a power amplification module, a switching module, a duplexer, an antenna switch and an antenna. An output signal is outputted to the switching module after being amplified by the power amplification module; the switching module divides same into a plurality of frequency band signals, and selects a current working frequency band according to a switching instruction; the duplexer controls the transceiving of a working frequency band signal; and when the antenna switch is turned on, the current working frequency band signal is transceived by the antenna.Type: ApplicationFiled: August 9, 2018Publication date: June 11, 2020Applicant: JRD Communication (Shenzhen) LTD.Inventors: Hua ZHANG, Zhicong YU
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Publication number: 20200170600Abstract: An x-ray imaging apparatus and associated methods are provided to receive measured projection data in a primary region and measured scatter data in a shadow region and determine an estimated scatter in the primary region during a current rotation based on the measured scatter data in the shadow region from a neighboring rotation. Coverage of the shadow region during the neighboring rotation overlaps the primary region during the current rotation. A beamformer is configured to adjust a shape of the radiation beam to create the primary and shadow regions on the detector, including an embodiment to follow the Tam-Danielson window during a helical scan.Type: ApplicationFiled: November 25, 2019Publication date: June 4, 2020Inventors: Zhicong Yu, Chuanyong Bai, Amit Jain, Daniel Gagnon
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Publication number: 20200170585Abstract: An x-ray imaging apparatus and associated methods are provided to process projection data from an offset detector during a helical scan, including view completion. The detector may be offset in the channel and/or axial direction. Projection data measured from a current view is combined with projection data measured from at least one conjugate view to reconstruct a target image. A two-dimensional aperture weighting scheme is used to address data redundancy.Type: ApplicationFiled: November 25, 2019Publication date: June 4, 2020Inventors: Zhicong Yu, Daniel Gagnon
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Publication number: 20200170601Abstract: An x-ray imaging apparatus and associated methods are provided to receive measured projection data from a wide aperture scan of a wide axial region and a narrow aperture scan of a narrow axial region within the wide axial region and determine an estimated scatter in the wide axial region using an optimized scatter estimation technique. The optimized scatter estimation technique is based on the difference between the measured scatter in the narrow axial region and the estimated scatter in the narrow axial region. Kernel-based scatter estimation/correction techniques can be fitted to minimize the scatter difference in the narrow axial region and thereafter applying the fitted (optimized) kernel-based scatter estimation/correction to the wide axial region. Optimizations can occur in the projection data domain or the reconstruction domain. Iterative processes are also utilized.Type: ApplicationFiled: November 25, 2019Publication date: June 4, 2020Inventors: Daniel Gagnon, Chuanyong Bai, Zhicong Yu, Amit Jain, Calvin R. Maurer, JR.
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Publication number: 20200175682Abstract: The present disclosure relates to systems and methods for image reconstruction. The systems may perform the methods to obtain image data, at least a portion of the image data relating to a region of interest (ROI); determine local information of the image data, the local information relating to orientation information of the image data; determine a regularization item based on the local information; and modify the image data based on the regularization item.Type: ApplicationFiled: February 10, 2020Publication date: June 4, 2020Applicant: UIH AMERICA, INC.Inventors: Zhicong YU, Stanislav ZABIC
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Publication number: 20200170590Abstract: Multimodal imaging apparatus and methods include a rotatable gantry system with multiple sources of radiation comprising different energy levels (for example, kV and MV). Fast slip-ring technology and helical scans allow data from multiple sources of radiation to be combined or utilized to generate improved images and workflows, including for IGRT. Features include large field-of-view (LFOV) MV imaging, kV region-of-interest (ROI) imaging, and scalable field-of-view (SFOV) dual energy imaging.Type: ApplicationFiled: November 25, 2019Publication date: June 4, 2020Inventors: Daniel Gagnon, Zhicong Yu, Jacob Shea