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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
申请人： Accuray, Inc.
发明人： Chuanyong Bai , Robert Zahn , Daniel Gagnon , Amit Jain , Zhicong Yu , Georgios Prekas
摘要： 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：US20220395243A1
公开(公告)日：2022-12-15
申请号：US17339319
申请日：2021-06-04
摘要： 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
申请人： Accuray, Inc.
发明人： Zhicong Yu , Chuanyong Bai , Amit Jain , Daniel Gagnon
摘要： 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：US11364007B2
公开(公告)日：2022-06-21
申请号：US16694177
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Zhicong Yu , Amit Jain , Daniel Gagnon , Jacob Shea
IPC分类号： A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
摘要： A method of scanning parameter optimization, which method may be useful with image-guided radiation therapy (IGRT), allows for controlling exposure of a beam from an x-ray source and/or controlling the detection mechanism for an x-ray detector of imaging radiation of a radiation-delivery device based on one or more parameters of a region of interest of a patient. The one or more parameters of the region of interest may include a dimension, outer contour, density, location relative to an outlet of the beam, location relative to isocenter, location to the whole patient body, etc. Exposure of the patient to the beam may be varied via modulation of one or more scanning parameters for controlling an aspect of the beam and/or the detector to provide for targeted and or reduced radiation exposure of the patient or portion of the patient, and/or for improved quality of guiding images. The modulation may be varied depending on a view angle of the region of interest from a portion of the radiation-delivery device.
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5.发明授权公开(公告)号：US11191511B2
公开(公告)日：2021-12-07
申请号：US16694230
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Zhicong Yu , Chuanyong Bai , Amit Jain , Daniel Gagnon , Jacob Shea , Wenli Wang , Calvin R. Maurer, Jr.
IPC分类号： A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
摘要： An imaging apparatus and associated methods are provided to efficiently estimate scatter during multi-fraction treatments for improved quality and workflow. Estimated scatter from one fraction during a treatment course can be utilized during subsequent fractions, allowing for measurements with higher scatter-to-primary ratios. The quality of scatter estimates can be maintained, while workflow improves and dosage decreases. Scan configuration limits can be utilized to maintain a minimum level of scatter measurement quality. Patient information can be monitored to ensure that prior fraction scatter estimates are still applicable to current patient status.
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公开(公告)号：US20200175733A1
公开(公告)日：2020-06-04
申请号：US16694166
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Zhicong Yu , Daniel Gagnon
摘要： 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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7.发明申请公开(公告)号：US20200170607A1
公开(公告)日：2020-06-04
申请号：US16694230
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Zhicong Yu , Chuanyong Bai , Amit Jain , Daniel Gagnon , Jacob Shea , Wenli Wang , Calvin R. Maurer, JR.
摘要： An imaging apparatus and associated methods are provided to efficiently estimate scatter during multi-fraction treatments for improved quality and workflow. Estimated scatter from one fraction during a treatment course can be utilized during subsequent fractions, allowing for measurements with higher scatter-to-primary ratios. The quality of scatter estimates can be maintained, while workflow improves and dosage decreases. Scan configuration limits can be utilized to maintain a minimum level of scatter measurement quality. Patient information can be monitored to ensure that prior fraction scatter estimates are still applicable to current patient status.
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公开(公告)号：US20200170596A1
公开(公告)日：2020-06-04
申请号：US16694177
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Zhicong Yu , Amit Jain , Daniel Gagnon , Jacob Shea
摘要： A method of scanning parameter optimization, which method may be useful with image-guided radiation therapy (IGRT), allows for controlling exposure of a beam from an x-ray source and/or controlling the detection mechanism for an x-ray detector of imaging radiation of a radiation-delivery device based on one or more parameters of a region of interest of a patient. The one or more parameters of the region of interest may include a dimension, outer contour, density, location relative to an outlet of the beam, location relative to isocenter, location to the whole patient body, etc. Exposure of the patient to the beam may be varied via modulation of one or more scanning parameters for controlling an aspect of the beam and/or the detector to provide for targeted and or reduced radiation exposure of the patient or portion of the patient, and/or for improved quality of guiding images. The modulation may be varied depending on a view angle of the region of interest from a portion of the radiation-delivery device.
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公开(公告)号：US20200170590A1
公开(公告)日：2020-06-04
申请号：US16694148
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Daniel Gagnon , Zhicong Yu , Jacob Shea
摘要： 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.
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公开(公告)号：US20200170585A1
公开(公告)日：2020-06-04
申请号：US16694190
申请日：2019-11-25
申请人： Accuray, Inc.
发明人： Zhicong Yu , Daniel Gagnon
摘要： 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.
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