Title :
An evaluation of three algorithms for reconstructing images from data with missing projections
Author :
Ollinger, John M. ; Karp, Joel S.
Author_Institution :
Dept. of Radiol., Pennsylvania Univ., Philadelphia, PA, USA
Abstract :
Three iterative reconstruction algorithm for reconstructing images from tomographic data with missing projections are evaluated. One algorithm iteratively minimizes a squared-error criteria; the other two, both transform algorithms, estimate the missing projections by placing constraints on the missing data. These algorithms are evaluated on the basis of their accuracy and computational speed. The transform methods are shown to be both faster and more accurate than the least-squares method.<>
Keywords :
computerised tomography; iterative methods; data; missing projections; reconstructing images; squared-error criteria; tomographic data; transform algorithms; Computed tomography; Fourier transforms; Image reconstruction; Image sampling; Iterative algorithms; Iterative methods; Maximum likelihood detection; Sensor arrays; X-ray detection; X-ray detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
