| 摘要 |
A method for reprojecting images (32) (76) into sinograms (74) (112) includes the steps of recursively dividing a two-dimensional image (32) (76) into sub-images (34, 36, 38, 40) (78, 80, 82, 84) as small as one pixel and reprojecting the sub-images at the same or a smaller number of orientations to form subsinograms (42, 44, 46, 48) (86, 88, 90, 92). By performing some aggregations with the exact algorithm and some aggregations with the approximate algorithm, switching between the two algorithms in one of a number of suitable ways, an accurate result can be obtained quickly.
|
