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公开(公告)号：US20240249451A1
公开(公告)日：2024-07-25
申请号：US18157504
申请日：2023-01-20
申请人： Elekta LTD.
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2210/41 , G06T2211/40
摘要： Systems and methods are disclosed for image processing of cone beam computed tomography (CBCT) image data, in connection with radiotherapy planning and treatments. Example operations for training a regression model for data processing include: obtaining a reference medical image of an anatomical area of a human patient; generating a set of CBCT projections from the reference medical image at each of a plurality of projection viewpoints in a CBCT projection space; generating a set of simulated scatter data to represent effects of scatter from CBCT imaging in each respective projection in the set of CBCT projections; and training the regression model using the set of CBCT projections and the set of simulated scatter data. Further operations for use of the trained regression model, and inferring scatter or scatter-corrected projections from the trained regression model, are disclosed.
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公开(公告)号：US20240245363A1
公开(公告)日：2024-07-25
申请号：US18157524
申请日：2023-01-20
申请人： Elekta LTD.
CPC分类号： A61B6/03 , A61B6/4085 , G06T11/005
摘要： Systems and methods are disclosed for image processing of cone beam computed tomography (CBCT) image data, in connection with radiotherapy planning and treatments. Example operations for training of a predictive regression model include: obtaining a reference medical image of an anatomical area (e.g., from a reference CT image); generating variation images that provide variation in representations of the anatomical area (e.g., from deformation or geometric transformation); identifying projection viewpoints (e.g., from projection capture angles in a CBCT projection space) for each of the plurality of variation images; generating, at each of the projection viewpoints, a set of CBCT projections and a corresponding set of simulated aspects of the CBCT projections; training an algorithm in the regression model, using the corresponding sets of the CBCT projections and the simulated aspects of the CBCT projections. Corresponding operations for the use of the regression model, including in radiotherapy treatments, are also disclosed.
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公开(公告)号：US11602646B2
公开(公告)日：2023-03-14
申请号：US17443895
申请日：2021-07-28
申请人： Elekta LTD.
IPC分类号： A61N5/10 , G06T7/33 , G16H40/63 , G16H20/40 , G16H30/20 , G16H30/40 , G16H50/20 , G06T7/20 , G06T7/246 , A61B6/02 , A61B90/00
摘要： Systems and methods are provided for registering images. The systems and methods perform operations comprising: receiving, at a first time point in a given radiation session, a first imaging slice corresponding to a first plane; encoding the first imaging slice to a lower dimensional representation; applying a trained machine learning model to the encoded first imaging slice to estimate an encoded version of a second imaging slice corresponding to a second plane at the first time point to provide a pair of imaging slices for the first time point; simultaneously spatially registering the pair of imaging slices to a volumetric image, received prior to the given radiation session, comprising a time-varying object to calculate displacement of the object; and generating an updated therapy protocol to control delivery of a therapy beam based on the calculated displacement of the object.
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公开(公告)号：US11234676B2
公开(公告)日：2022-02-01
申请号：US15898498
申请日：2018-02-17
申请人： Elekta LTD.
发明人： Francois Marcil
摘要： Systems and methods can include a system for positioning an ultrasound probe proximal to anatomy of a patient on a radiation couch including a substantially planar base including engagement features to directly or indirectly index the substantially planar base to the radiation couch and a centrally located guide extending longitudinally along a top side of the base, a probe holder, configured to be coupled to, to translate longitudinally, and to be user-accessed and user-controlled from within, a central region of the substantially planar base, a clamp, configured to localize the probe holder at a specified location along a translation path in the central region of the substantially planar base, leg supports shaped to accommodate a patient's legs from behind, the pair of leg supports being shaped and arranged to provide a space therebetween that can accommodate an ultrasound probe holder.
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公开(公告)号：US20210361974A1
公开(公告)日：2021-11-25
申请号：US17443895
申请日：2021-07-28
申请人： Elekta LTD.
IPC分类号： A61N5/10 , G06T7/33 , G16H40/63 , G16H20/40 , G16H30/20 , G16H30/40 , G16H50/20 , G06T7/20 , G06T7/246
摘要： Systems and methods are provided for registering images. The systems and methods perform operations comprising: receiving, at a first time point in a given radiation session, a first imaging slice corresponding to a first plane; encoding the first imaging slice to a lower dimensional representation; applying a trained machine learning model to the encoded first imaging slice to estimate an encoded version of a second imaging slice corresponding to a second plane at the first time point to provide a pair of imaging slices for the first time point; simultaneously spatially registering the pair of imaging slices to a volumetric image, received prior to the given radiation session, comprising a time-varying object to calculate displacement of the object; and generating an updated therapy protocol to control delivery of a therapy beam based on the calculated displacement of the object.
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公开(公告)号：US20210268313A1
公开(公告)日：2021-09-02
申请号：US17182572
申请日：2021-02-23
申请人： Elekta Ltd
发明人： Niklas Gunnarsson , Jens Sjölund
摘要： The present invention relates to the field of radiation therapy and methods, software and systems for image registration. According to the present invention, methods for image registration of images of a patient comprising are provided. The method may include receiving a set of image data from the patient; selecting one or more tracking regions in the set of image data, each tracking region including a tracking point or set of tracking points; receiving sets of image data captured at different times from the patient; identifying corresponding tracking regions in the sets of image data captured at different times; estimating a displacement field describing displacement vectors for a number of points in the sets of image data including the tracking regions, each displacement vector specifying a position of a region in reference to a previous position.
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公开(公告)号：US20210046329A1
公开(公告)日：2021-02-18
申请号：US16824276
申请日：2020-03-19
申请人： Elekta LTD.
摘要： Systems and methods are provided for registering images. The systems and methods perform operations comprising: receiving, at a first time point during a given radiation session, a first imaging slice comprising an object, the first imaging slice corresponding to a first plane; accessing, at the first time point during the given radiation session, a composite imaging slice corresponding to the first plane, the composite imaging slice being generated using a plurality of imaging slices obtained prior to the first time point; spatially registering the first imaging slice and the composite imaging slice; determining movement of the object using the spatially registered first imaging slice and the composite imaging slice; and generating an updated therapy protocol to control delivery of a therapy beam based on the determined movement.
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公开(公告)号：US20190231306A1
公开(公告)日：2019-08-01
申请号：US15898503
申请日：2018-02-17
申请人： Elekta LTD.
发明人： Francois Marcil
CPC分类号： A61B8/4209 , A61B8/40 , A61B90/57 , A61B2090/0808 , A61N5/1039 , A61N5/1049 , A61N2005/1058 , A61N2005/1097
摘要： Systems and methods can include a system for positioning an ultrasound probe proximal to anatomy of a patient on a radiation couch including a substantially planar base including engagement features to directly or indirectly index the substantially planar base to the radiation couch and a centrally located guide extending longitudinally along a top side of the base, a probe holder, configured to be coupled to, to translate longitudinally, and to be user-accessed and user-controlled from within, a central region of the substantially planar base, a clamp, configured to localize the probe holder at a specified location along a translation path in the central region of the substantially planar base, leg supports shaped to accommodate a patient's legs from behind, the pair of leg supports being shaped and arranged to provide a space therebetween that can accommodate an ultrasound probe holder.
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公开(公告)号：US20190231303A1
公开(公告)日：2019-08-01
申请号：US15898486
申请日：2018-02-17
申请人： Elekta LTD.
发明人： Francois Marcil
CPC分类号： A61B8/4209 , A61B8/40 , A61B90/57 , A61B2090/0808 , A61N5/1039 , A61N5/1049 , A61N2005/1058 , A61N2005/1097
摘要： Systems and methods can include a system for positioning an ultrasound probe proximal to anatomy of a patient on a radiation couch including a substantially planar base including engagement features to directly or indirectly index the substantially planar base to the radiation couch and a centrally located guide extending longitudinally along a top side of the base, a probe holder, configured to be coupled to, to translate longitudinally, and to be user-accessed and user-controlled from within, a central region of the substantially planar base, a clamp, configured to localize the probe holder at a specified location along a translation path in the central region of the substantially planar base, leg supports shaped to accommodate a patient's legs from behind, the pair of leg supports being shaped and arranged to provide a space therebetween that can accommodate an ultrasound probe holder.
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公开(公告)号：US20180321337A1
公开(公告)日：2018-11-08
申请号：US15586988
申请日：2017-05-04
申请人： ELEKTA LTD.
发明人： Henrik ALEXIS , Kjell ELDERED , Erik CARLANDER
摘要： A structural element for use in a radiotherapy system or a magnetic resonance imaging system or a combination of a radiotherapy system and a magnetic resonance imaging system includes a plurality of fibers and a matrix, whereby the plurality of fibers are embedded in the matrix.
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