-
公开(公告)号：US10478148B2
公开(公告)日：2019-11-19
申请号：US15436042
申请日：2017-02-17
发明人： Jeffrey H. Siewerdsen , Yoshito Otake , Joseph Webster Stayman , Ali Uneri , Adam S. Wang , Sarah Ouadah
摘要： The present invention is directed to a method for enabling volumetric image reconstruction from unknown projection geometry of tomographic imaging systems, including CT, cone-beam CT (CBCT), and tomosynthesis systems. The invention enables image reconstruction in cases where it was not previously possible (e.g., custom-designed trajectories on robotic C-arms, or systems using uncalibrated geometries), and more broadly offers improved image quality (e.g., improved spatial resolution and reduced streak artifact) and robustness to patient motion (e.g., inherent compensation for rigid motion) in a manner that does not alter the patient setup or imaging workflow. The method provides a means for accurately estimating the complete geometric description of each projection acquired during a scan by simulating various poses of the x-ray source and detector to determine their unique, scan-specific positions relative to the patient, which is often unknown or inexactly known (e.g., a custom-designed trajectory, or scan-to-scan variability in source and detector position).
-
公开(公告)号：US20170238897A1
公开(公告)日：2017-08-24
申请号：US15436042
申请日：2017-02-17
发明人： Jeffrey H. Siewerdsen , Yoshito Otake , Joseph Webster Stayman , Ali Uneri , Adam S. Wang , Sarah Ouadah
CPC分类号： A61B6/584 , A61B6/025 , A61B6/032 , A61B6/4085 , A61B6/4441 , A61B6/466 , A61B6/501 , A61B6/5205
摘要： The present invention is directed to a method for enabling volumetric image reconstruction from unknown projection geometry of tomographic imaging systems, including CT, cone-beam CT (CBCT), and tomosynthesis systems. The invention enables image reconstruction in cases where it was not previously possible (e.g., custom-designed trajectories on robotic C-arms, or systems using uncalibrated geometries), and more broadly offers improved image quality (e.g., improved spatial resolution and reduced streak artifact) and robustness to patient motion (e.g., inherent compensation for rigid motion) in a manner that does not alter the patient setup or imaging workflow. The method provides a means for accurately estimating the complete geometric description of each projection acquired during a scan by simulating various poses of the x-ray source and detector to determine their unique, scan-specific positions relative to the patient, which is often unknown or inexactly known (e.g., a custom-designed trajectory, or scan-to-scan variability in source and detector position).
-
搜索结果
2 条记录 (耗时 0.017 秒)
