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公开(公告)号：US20230026441A1
公开(公告)日：2023-01-26
申请号：US17383740
申请日：2021-07-23
Applicant: Accuray, Inc.
Inventor： Chuanyong Bai , Robert Zahn , Daniel Gagnon , Amit Jain , Zhicong Yu , Georgios Prekas
Abstract: Disclosed herein is an imaging system including a first x-ray source configured to produce first x-ray photons in a first energy range suitable for imaging, project the first x-ray photons onto an area designated for imaging, a rotatable gantry configured to rotate the first x-ray source such that the first x-ray source traverses an angular path, and a data processor having an analytical portion. The analytical portion is configured to collect first data relating to the transmission of the first x-ray photons through the area designated for imaging at a set of image-collection angles along the angular path, collect background data at a set of background-collection angles along the angular path, wherein the system acquires more than one image of the designated area for imaging between background angles. The analytical portion is also configured to remove errors in the first data using the background data, and generate a corrected image based on the removal of errors in the first data.
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公开(公告)号：US20230013818A1
公开(公告)日：2023-01-19
申请号：US17363959
申请日：2021-06-30
Applicant: ACCURAY INC.
Inventor： Jacob Shea , Chuanyong Bai
Abstract: A radiological imaging apparatus is provided that includes a radiation source for emitting radiation, a radiation detector positioned to receive radiation emitted by the radiation source and generate radiation data, wherein the radiation data comprises a primary component and a secondary component, and a data processing system. The data processing system is configured to apply image transforms to the primary component using generating functions, build a scatter model basis using the transforms, adjust parameters in the scatter model to fit scatter using the scatter model basis, generate an estimated scatter image by using the fitted scatter model, and modify the radiation data using the scatter image to decrease the scatter in the radiation data thereby generating a scatter corrected image.
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公开(公告)号：US20220395243A1
公开(公告)日：2022-12-15
申请号：US17339319
申请日：2021-06-04
Applicant: Accuray, Inc. , The University of Chicago
Inventor： Patrick La Riviere , Daniel Gagnon , Zhicong Yu , Julian Bertini , Phillip Vargas
Abstract: A radio therapy system includes a first x-ray source. The first x-ray source is configured to produce first x-ray photons in a first energy range suitable for imaging and project the first x-ray photons onto an area designated for imaging. The system includes a second x-ray source configured to produce second x-ray photons in a second energy range higher energy than the first energy range, produce third x-ray photons in a third energy range higher energy than the first energy range, project the second x-ray photons onto the area designated for imaging, and project the third x-ray photons onto an area designated for treatment. The system includes an analytical portion configured to collect and combine data to create a composite output including at least one image, the combining based in part on a spectral analysis.
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公开(公告)号：US20200170600A1
公开(公告)日：2020-06-04
申请号：US16694202
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Zhicong Yu , Chuanyong Bai , Amit Jain , Daniel Gagnon
Abstract: 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.
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公开(公告)号：US11854123B2
公开(公告)日：2023-12-26
申请号：US17383740
申请日：2021-07-23
Applicant: Accuray, Inc.
Inventor： Chuanyong Bai , Robert Zahn , Daniel Gagnon , Amit Jain , Zhicong Yu , Georgios Prekas
CPC classification number: G06T11/005 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/4435 , A61B6/54 , G06T2211/408
Abstract: Disclosed herein is an imaging system including a first x-ray source configured to produce first x-ray photons in a first energy range suitable for imaging, project the first x-ray photons onto an area designated for imaging, a rotatable gantry configured to rotate the first x-ray source such that the first x-ray source traverses an angular path, and a data processor having an analytical portion. The analytical portion is configured to collect first data relating to the transmission of the first x-ray photons through the area designated for imaging at a set of image-collection angles along the angular path, collect background data at a set of background-collection angles along the angular path, wherein the system acquires more than one image of the designated area for imaging between background angles. The analytical portion is also configured to remove errors in the first data using the background data, and generate a corrected image based on the removal of errors in the first data.
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Patent Agency Ranking
公开(公告)号：US11357467B2
公开(公告)日：2022-06-14
申请号：US16694192
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Daniel Gagnon , Chuanyong Bai , Zhicong Yu
IPC: A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
Abstract: An x-ray imaging apparatus and associated methods are provided to execute multi-pass imaging scans for improved quality and workflow. An imaging scan can be segmented into multiple passes that are faster than the full imaging scan. Data received by an initial scan pass can be utilized early in the workflow and of sufficient quality for treatment setup, including while the another scan pass is executed to generate data needed for higher quality images, which may be needed for treatment planning. In one embodiment, a data acquisition and reconstruction technique is used when the detector is offset in the channel and/or axial direction for a large FOV during multiple passes.
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公开(公告)号：US11337668B2
公开(公告)日：2022-05-24
申请号：US16694166
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Zhicong Yu , Daniel Gagnon
IPC: A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
Abstract: A computed tomography (CT) system and method is provided. The CT system is used to carry out an image improvement method in which a prior or previously-acquired patient image can be used to supplement or otherwise improve an acquired CT image, wherein the acquired projection data representative of the acquired CT image might be truncated or otherwise incomplete/insufficient to accurately and stably recover the scanned object/patient.
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公开(公告)号：US11324471B2
公开(公告)日：2022-05-10
申请号：US16694210
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Chuanyong Bai , Amit Jain , Daniel Gagnon , Zhicong Yu , Jacob Shea
IPC: A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
Abstract: An x-ray imaging apparatus and associated methods are provided to receive measured projection data in a primary region and measured scatter data in asymmetrical shadow regions and determine an estimated scatter in the primary region based on the measured scatter data in the shadow region(s). The asymmetric shadow regions can be controlled by adjusting the position of the beam aperture center on the readout area of the detector. Penumbra data may also be used to estimate scatter in the primary region.
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公开(公告)号：US20220000443A1
公开(公告)日：2022-01-06
申请号：US17479645
申请日：2021-09-20
Applicant: Accuray, Inc.
Inventor： Jacob Shea , Brandon Frederick , Eric Schnarr , Daniel Gagnon
Abstract: A multimodal imaging apparatus, comprising a rotatable gantry system positioned at least partially around a patient support, a first source of radiation coupled to the rotatable gantry system, the first source of radiation configured for imaging radiation, a second source of radiation coupled to the rotatable gantry system, the second source of radiation configured for at least one of imaging radiation or therapeutic radiation, wherein the second source of radiation has an energy level more than the first source of radiation, and a second radiation detector coupled to the rotatable gantry system and positioned to receive radiation from the second source of radiation, and a processor configured to combine first measured projection data based on the radiation detected by the first detector with second measured projection data based on the radiation detected by the second detector, and reconstruct an image based on the combined data, wherein the reconstructing comprises at least one of correcting the second measured projection data using the first measured projection data, correcting the first measured projection data using the second projection data, and distinguishing different materials imaged in the combined data using the first measured projection data and the second measured projection.
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公开(公告)号：US11166690B2
公开(公告)日：2021-11-09
申请号：US16823560
申请日：2020-03-19
Applicant: Accuray, Inc.
Inventor： Chuanyong Bai , Zhicong Yu , Amit Jain , Daniel Gagnon
IPC: A61B6/00 , G01N23/201 , A61N5/10 , A61B6/03
Abstract: 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.
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