| 摘要 |
<p>A CT cone beam imaging system is provided wherein a source (12) of cone beam radiation and a detector array (16) are mounted for movement with respect to an object (10), to provide a reconstructed image of the object (10). Relative movement is established between the cone beam source (12) and the object (10) along a scan path comprising a circular component (26) and a linear component (34). To minimize processing requirements a subset of data elements is selected from the linear data set, wherein each of the selected data elements is associated with a set of spatial parameters which define spatial regions (18a) contained within a hypothetical sphere (18), the Radon space, but which are not intersected by a Radon shell. First and second sets of image reconstruction data are respectively generated from the subset of the linear data and the circular data and combined to provide an image of the object.</p> |
