Title :
Comparative evaluation of two analytical methods for Helical Cone-Beam Tomography
Author :
Schöndube, Harald ; Stierstorfer, Karl ; Dennerlein, Frank ; Noo, Frédéric
Author_Institution :
Univ. of Utah, Lake City
fDate :
Oct. 26 2007-Nov. 3 2007
Abstract :
We present some extensions to the recently published "DBP-0" method which are important for making the algorithm more suitable for clinical routine. These extensions are (i) an incorporation of the slice thickness into the reconstruction process, (ii) a way of reconstructing a region of interest smaller than the FOV, (iii) the possibility to reconstruct from flying focal spot data and (iv) a frequency apodization scheme for influencing the resolution vs. noise level during reconstruction. We furthermore present an evaluation of the DBP-0 method against the approximate Weighted FBP (WFBP) algorithm in terms of resolution, noise and subjective appearance of reconstructed images.
Keywords :
computerised tomography; image reconstruction; image resolution; medical image processing; DBP-0 method; flying focal spot data; frequency apodization; helical cone-beam tomography; image noise; image reconstruction; image resolution; weighted FBP algorithm; Biomedical imaging; Computed tomography; Data acquisition; Detectors; Frequency; Geometry; Image reconstruction; Image resolution; Noise level; Nuclear and plasma sciences;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0922-8
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2007.4437103
