Title :
Helical FDK algorithms with no backprojection weight
Author :
Narasimhadhan, A.V. ; Rajgopal, K.
Author_Institution :
Electr. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
In this paper, we present two new filtered back-projection (FBP) type algorithms for cylindrical detector helical cone-beam geometry with no position dependent backprojection weight. The algorithms are extension of the recent exact Hilbert filtering based 2D divergent beam reconstruction with no back-projection weight to the FDK type algorithm for reconstruction in 3D helical trajectory cone-beam tomography. The two algorithms named HFDK-W1 and HFDK-W2 result in better image quality, noise uniformity, lower noise and reduced cone-beam artifacts.
Keywords :
Hilbert transforms; computerised tomography; image reconstruction; medical image processing; 2D divergent beam reconstruction; Hilbert filtering; cylindrical detector helical cone-beam geometry; filtered back-projection type algorithm; helical FDK algorithm; helical trajectory cone-beam tomography; Approximation algorithms; Computational efficiency; Detectors; Filtering algorithms; Geometry; Image quality; Image reconstruction; Noise reduction; Reconstruction algorithms; Tomography;
Conference_Titel :
TENCON 2009 - 2009 IEEE Region 10 Conference
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-4546-2
Electronic_ISBN :
978-1-4244-4547-9
DOI :
10.1109/TENCON.2009.5395953
