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公开(公告)号：EP3939510A1
公开(公告)日：2022-01-19
申请号：EP21191553.3
申请日：2018-05-03
IPC分类号： A61B6/00 , G01N23/046 , G06T5/00 , G06T11/00 , A61B6/03 , G09B23/28 , A61B6/06 , G16H50/20 , G21K1/10 , G21K5/04
摘要： A method to estimate scattered radiation contained in x-ray projections for computed tomography, CT, reconstruction, comprising generating a simulated scatter image by constructing a Boltzmann Transport Equation, BTE, for a first subset of particles scattered during a simulated CT scanning of the object model; using a deterministic method to solve the BTE and calculate corresponding particle fluence distribution values in a plurality of voxels; and generating the simulated scatter image based on the corresponding particle fluence distribution values in the plurality of voxels; wherein the BTE is a differential equation that has, on a first side, two items comprising (i) a leakage operator and (ii) an interaction operator; and that has, on a second side, two items comprising (i) external sources and (ii) scattering sources.
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公开(公告)号：EP3361953A1
公开(公告)日：2018-08-22
申请号：EP16856068.8
申请日：2016-10-12
发明人： PAYSAN, Pascal , BREHM, Marcus , WANG, Adam , SEGHERS, Dieter , STAR-LACK, Josh
CPC分类号： A61N5/1039 , A61B6/032 , A61B6/4085 , A61B6/4441 , A61B6/5205 , A61N5/1045 , A61N5/1081 , G06T11/008 , G06T2211/424
摘要： Reconstruction of projection images of a CBCT scan is performed by generating simulated projection data, comparing the simulated projection data to the projection images of the CBCT scan, determining a residual volume based on the comparison, and using the residual volume to determine an accurate reconstructed volume. The reconstructed volume can be used to segment a tumor (and potentially one or more organs) and align the tumor to a planning volume (e.g., from a CT scan) to identify changes, such as shape of the tumor and proximity of the tumor to an organ. These changes can be used to update a radiation therapy procedure, such as by altering a radiation treatment plan and fine-tuning a patient position.
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公开(公告)号：EP3400876A1
公开(公告)日：2018-11-14
申请号：EP18170587.2
申请日：2018-05-03
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/4035 , A61B6/4085 , A61B6/483 , G01N23/046 , G06T5/00 , G06T5/002 , G06T7/0012 , G06T11/005 , G06T11/20 , G06T2207/10081 , G09B23/286 , G21K1/10 , G21K5/04
摘要： In accordance with at least some embodiments of the present disclosure, a process to estimate scattered radiation contained in x-ray projections for computed tomography (CT) reconstruction is provided. The process may construct an object model 215 based on a plurality of projection images 205 generated by CT scanning of an object using an x-ray radiation source and a detector panel. The process may construct 230 a virtual radiation source based on the x-ray radiation source, and a virtual detector panel based on the detector panel. The process may perform a simulated CT scanning 220 of the object model by simulating macroscopic behavior of particles being emitted from the virtual radiation source, passing through the object model, and being detected by the virtual detector panel. And the process may generate a simulated scatter image based on a first subset of particles scattered during the simulated CT scanning of the object model.
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公开(公告)号：EP2718870B1
公开(公告)日：2018-10-31
申请号：EP12796784.2
申请日：2012-06-04
发明人： STAR-LACK, Josh , SUN, Mingshan
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2211/412
摘要： In accordance with at least some embodiments of the present disclosure, a process for enhancing a motion-blurred image is presented. The process may include receiving a plurality of projections, wherein the plurality of projections contain computed tomography (CT) data obtained in multiple motion phases. The process may include generating an enhanced multi-phase image by performing an enhancement operation based on the plurality of projections. The process may further include generating a plurality of phase-correlated images based on the plurality of projections and the enhanced multi-phase image.
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公开(公告)号：EP2378973B1
公开(公告)日：2015-05-27
申请号：EP10732113.5
申请日：2010-01-15
发明人： STAR-LACK, Josh , MOSTAFAVI, Hassan
CPC分类号： A61N5/1049 , A61B6/025 , A61B6/4085 , A61B6/5205 , A61B6/542 , A61N5/1065 , A61N2005/1061 , G01N23/044 , G01N2223/419
摘要： One embodiment of the present disclosure sets forth a method for determining a movement of a target region using tomosynthesis. The method includes the steps of accessing a first set of projection radiographs of the target region over a first processing window defined by a first range of projection angles, accessing a second set of projection radiographs of the target region over a second processing window defined by a second range of projection angles, wherein the first processing window slides to the second processing window during treatment of the target region, and comparing a first positional information derived from the first set of the projection radiographs and a second positional information derived from the second set of the projection radiographs with the first positional information to determine the movement of the target region.
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公开(公告)号：EP2718870A1
公开(公告)日：2014-04-16
申请号：EP12796784.2
申请日：2012-06-04
发明人： STAR-LACK, Josh , SUN, Mingshan
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/412
摘要： In accordance with at least some embodiments of the present disclosure, a process for enhancing a motion-blurred image is presented. The process may include receiving a plurality of projections, wherein the plurality of projections contain computed tomography (CT) data obtained in multiple motion phases. The process may include generating an enhanced multiphase image by performing an enhancement operation based on the plurality of projections. The process may further include generating a plurality of phase-correlated images based on the plurality of projections and the enhanced multi-phase image.
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公开(公告)号：EP2633293A1
公开(公告)日：2013-09-04
申请号：EP11836805.9
申请日：2011-09-09
发明人： STAR-LACK, Josh , MOSTAFAVI, Hassan
IPC分类号： G01N23/00
CPC分类号： A61B6/025 , A61B6/027 , A61B6/12 , A61B6/4014 , A61B6/4085 , A61B6/4233 , A61B6/4266 , A61B6/4435 , A61B6/4452 , A61B6/4476 , A61B6/5205 , A61B6/5217 , A61N5/1049 , A61N2005/1054 , A61N2005/1061 , G01N23/044 , G01N2223/419 , G01N2223/612
摘要： One embodiment of the present disclosure sets forth a method for determining a movement of a target region using tomosynthesis. The method includes the steps of accessing a first set of projection radiographs of the target region over a first processing window defined by a first range of projection angles, accessing a second set of projection radiographs of the target region over a second processing window defined by a second range of projection angles, wherein the first processing window moves to the second processing window, and comparing a first positional information derived from the first set of the projection radiographs and a second positional information derived from the second set of the projection radiographs with the first positional information to determine the movement of the target region.
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公开(公告)号：EP3655101A1
公开(公告)日：2020-05-27
申请号：EP18755712.9
申请日：2018-07-19
发明人： SMITH, Christel , ZANKOWSKI, Corey , TIMMER, Jan Hein , KAISSL, Wolfgang , KHUNTIA, Deepak , ABEL, Eric , STAR-LACK, Josh , NOEL, Camille
IPC分类号： A61N5/10
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