Title :
A reconstruction method for helical computed tomography
Author :
Rischal, Ariel ; Young, Susan S. ; Soumekh, Mehrdad
Author_Institution :
Dept. of Electr. & Comput. Eng., State Univ. of New York, Buffalo, NY, USA
Abstract :
This paper presents a method for volumetric reconstruction from helical computerized tomography (H-CT) data which are collected with a fan beam source. An interpretation of the H-CT data in terms of the axial computerized tomography (A-CT) data is provided. This analysis indicates that the H-CT data for positive and negative detector angles can be combined to form periodically nonuniform hexagonal samples of the A-CT data. A Fourier-based method to reconstruct the A-CT data from this form of data coverage is presented. The target function is then reconstructed using the conventional fan beam computed tomography algorithms for A-CT
Keywords :
Fourier analysis; computerised tomography; image reconstruction; medical image processing; tomography; Fourier-based method; H-CT data; axial computerized tomography; data coverage; fan beam computed tomography algorithms; fan beam source; helical computed tomography; periodically nonuniform hexagonal samples; reconstruction method; target function; volumetric reconstruction; Biomedical imaging; Computed tomography; Data acquisition; Detectors; Image databases; Image reconstruction; Interpolation; Laboratories; Lighting; Reconstruction algorithms;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.595385
