发明名称 |
Cone beam ct apparatus using truncated projections and a previously acquired 3d ct image |
摘要 |
A 3D image of a region of an object is computed from truncated cone beam projection data acquired with an x-ray device and a prior CT image representing a larger region of the object. The truncated projection data are extrapolated to derive pseudoprojection data associated with projection directions outside the detector, and an intermediate CT image is reconstructed based on the truncated projection data completed with the pseudoprojection data. The prior CT image is then registered with the intermediate CT image. Forward projection data associated with projection directions outside the detector are computed from the truncated projection data and the registered prior CT image. The 3D image is finally reconstructed based on the truncated projection data completed with the forward projection data.
|
申请公布号 |
US2007195923(A1) |
申请公布日期 |
2007.08.23 |
申请号 |
US20050568115 |
申请日期 |
2005.03.31 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
NETSCH THOMAS;ROSE GEORG;SCHOMBERG HERMANN |
分类号 |
H05G1/60;A61B6/00;G01N23/00;G06T11/00;G21K1/12 |
主分类号 |
H05G1/60 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|