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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：EP3340883A1
公开(公告)日：2018-07-04
申请号：EP16840243.6
申请日：2016-08-26
CPC分类号： A61B6/5264 , A61B6/032 , A61B6/4085 , G06T7/0012 , G06T11/005 , G06T11/008 , G06T2207/10081 , G06T2211/432
摘要： One example method to reduce image artifacts, which may include obtaining measured projection data acquired using an imaging system. The measured projection data is associated with a target object and an artifact source within a radiation field of the imaging system. The method may also include generating virtual projection data associated with the artifact source by forward projecting a model representing one or more physical properties of the artifact source. The method may further include generating corrected projection data based on the measured projection data and the virtual projection data; and reconstructing the corrected projection data into reconstructed volume image data to reduce image artifacts caused by the artifact source.
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