Title :
A rebinning-type backprojection-filtration algorithm for region of interest reconstruction in fan-beam CT with improved noise properties
Author :
Yu, Lifeng ; Xia, Dan ; Zou, Yu ; Sidky, Emil Y. ; Pan, Xiaochuan ; Pelizzari, Charles A.
Author_Institution :
Dept. of Radiol., Chicago Univ., IL
Abstract :
We propose an alternative backprojection-filtration(BPF)-based reconstruction algorithm for fan-beam CT, which reconstructs images by first converting the fan-beam data to fan-parallel-beam data and then using a modified parallel-beam BPF algorithm to obtain the reconstruction. This proposed algorithm retains the properties of the original fan-beam BPF algorithm in that it can reconstruct exact region of interest (ROI) images from truncated data and/or super-short-scan data. The major advantage of this algorithm is its improved noise properties because of the elimination of the spatially-variant weighting factor. In addition, the proposed algorithm is computationally more efficient
Keywords :
computerised tomography; image reconstruction; medical image processing; noise; fan-beam CT; image reconstruction; improved noise properties; rebinning-type backprojection-filtration algorithm; region of interest reconstruction; Band pass filters; Computed tomography; Data conversion; Image converters; Image reconstruction; Image segmentation; Interpolation; Oncology; Radiology; Reconstruction algorithms;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2005 IEEE
Conference_Location :
Fajardo
Print_ISBN :
0-7803-9221-3
DOI :
10.1109/NSSMIC.2005.1596893
