Title :
A new wavelet-based cone-beam local reconstruction algorithm for off-centered circular trajectory
Author :
Cao, Haoshu ; Cai, Ke ; Xu, Min ; Li, Deyu
Author_Institution :
Sch. of Biol. Sci. & Med. Eng., Beihang Univ., Beijing, China
Abstract :
Cone-beam computed tomography for circular trajectory has been widely used. Sometimes off-centered circular trajectory has to be used because of some mechanical restrictions. In this paper, we develop an algorithm to reconstruct ROI from local cone-beam projections for off-centered circular trajectory. The proposed method is derived from combination of α-FDK and wavelet-based algorithm, and their advantages are maintained. Neither severe truncation artifacts nor details blurring occurs in the reconstructed image.
Keywords :
computerised tomography; image reconstruction; medical image processing; wavelet transforms; Feldkamp wavelet-based algorithm; cone-beam computed tomography; image reconstruction; off-centered trajectory; region of interest; wavelet-based cone-beam local reconstruction algorithm; Filtering algorithms; Image reconstruction; Phantoms; Pixel; Teeth; Tomography; Trajectory; α-FDK; cone-beam CT; local tomography; medical imaging; wavelet;
Conference_Titel :
Biomedical Engineering and Informatics (BMEI), 2010 3rd International Conference on
Conference_Location :
Yantai
Print_ISBN :
978-1-4244-6495-1
DOI :
10.1109/BMEI.2010.5639507
