Title :
New super-short-scan algorithms for fan-beam and cone-beam reconstruction
Author :
Kudo, Hiroyuki ; Noo, Frederic ; Defrise, Michel ; Clackdoyle, Rolf
Author_Institution :
Univ. of Tsukuba, Japan
Abstract :
This paper deals with image reconstruction from fan-beam and cone-beam projections when only a region of interest (ROI) is to be reconstructed. We propose a new fan-beam FBP algorithm which can achieve exact ROI reconstruction if and only if all lines passing through the ROI intersect the source trajectory. This requirement on the scanning range is significantly weaker compared to that required by the conventional fan-beam FBP algorithm. Furthermore, this algorithm is extended to cone-beam tomography when the source trajectory is a short-arc on the single circle.
Keywords :
image reconstruction; medical image processing; positron emission tomography; single photon emission computed tomography; cone-beam reconstruction; fan-beam reconstruction; image reconstruction; super-short-scan algorithms; tomography; Computed tomography; Data acquisition; Image reconstruction; Optical imaging; Reconstruction algorithms; Smoothing methods; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2002 IEEE
Print_ISBN :
0-7803-7636-6
DOI :
10.1109/NSSMIC.2002.1239470
