Title :
Constrained Fourier space method for compensation of missing data in emission computed tomography
Author :
Karp, Joel S. ; Muehllehner, Gerd ; Lewitt, Robert M.
Author_Institution :
Dept. of Radiol., Hospital of the Univ. of Pennsylvania, Philadelphia, PA, USA
fDate :
3/1/1988 12:00:00 AM
Abstract :
A method is introduced to compensate for missing projection data that can result from gas between detectors or from malfunctioning detectors. This method uses constraints in the Fourier domain to estimate the missing data, thus completing the data set so that the filtered backprojection algorithm can be used to reconstruct artifact-free images. The image reconstructed from estimates using this technique and a data set with gaps is nearly indistinguishable from an image reconstructed from a complete data set without gaps, using a simulated brain phantom
Keywords :
computerised tomography; radioisotope scanning and imaging; artifact-free images reconstruction; constrained Fourier space method; emission computed tomography; filtered backprojection algorithm; malfunctioning detectors; medical diagnostic images; missing data compensation; nuclear medicine; simulated brain phantom; Brain modeling; Computational modeling; Computed tomography; Gamma ray detection; Gamma ray detectors; Image reconstruction; Imaging phantoms; Iterative algorithms; Motion detection; Sampling methods;
Journal_Title :
Medical Imaging, IEEE Transactions on
