-
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.
-
公开(公告)号：US11364007B2
公开(公告)日：2022-06-21
申请号：US16694177
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Zhicong Yu , Amit Jain , Daniel Gagnon , Jacob Shea
IPC: A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
Abstract: 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.
-
3.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
Applicant: Accuray, Inc.
Inventor： Zhicong Yu , Chuanyong Bai , Amit Jain , Daniel Gagnon , Jacob Shea , Wenli Wang , Calvin R. Maurer, Jr.
IPC: A61B6/00 , G06T11/00 , A61B6/03 , A61B6/06 , A61B6/02 , A61N5/10 , A61B6/08 , G06T7/30 , A61B5/055 , A61B6/04
Abstract: 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.
-
4.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
Applicant: Accuray, Inc.
Inventor： Zhicong Yu , Chuanyong Bai , Amit Jain , Daniel Gagnon , Jacob Shea , Wenli Wang , Calvin R. Maurer, JR.
Abstract: 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.
-
公开(公告)号：US20200170596A1
公开(公告)日：2020-06-04
申请号：US16694177
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Zhicong Yu , Amit Jain , Daniel Gagnon , Jacob Shea
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20200170590A1
公开(公告)日：2020-06-04
申请号：US16694148
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Daniel Gagnon , Zhicong Yu , Jacob Shea
Abstract: 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.
-
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.
-
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.
-
公开(公告)号：US20200170598A1
公开(公告)日：2020-06-04
申请号：US16694145
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Jacob Shea , Brandon Frederick , Eric Schnarr , Daniel Gagnon
Abstract: 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 increasing the precision of spatial registrations between respective image sets to allow more precise radiation treatment delivery, reducing image artifacts (e.g., scatter, metal and beam hardening, image blur, motion, etc.), and utilization of dual energy imaging (e.g., for material separation and quantitative imaging, patient setup, online adaptive IGRT, etc.).
-
10.发明申请公开(公告)号：US20200170592A1
公开(公告)日：2020-06-04
申请号：US16694210
申请日：2019-11-25
Applicant: Accuray, Inc.
Inventor： Chuanyong Bai , Amit Jain , Daniel Gagnon , Zhicong Yu , Jacob Shea
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.
-
-
-
-
-
-
-
-
-
Search Results
16
records
(took 0.014 seconds)
