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Author Zeng, G.L.
Sponsorship IEEE Engineering in Medicine and Biology Society ♦ IEEE Nuclear and Plasma Sciences Society ♦ IEEE Signal Processing Society ♦ IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1982
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science ♦ Technology ♦ Medicine & health ♦ Engineering & allied operations
Subject Keyword Computed tomography ♦ Image reconstruction ♦ Geometry ♦ Detectors ♦ Filtering ♦ Frequency domain analysis ♦ Convolution ♦ Digital filters ♦ Image edge detection ♦ Image analysis
Abstract It is observed that when the homogeneity property of the ramp filter is used to derive a filtered backprojection algorithm in fan-beam tomography, the reconstructed images have nonstationary frequency components and nonstationary noise. When a short focal-length is used, higher frequency components are amplified more at the edge of the image than at the center of the image, resulting in higher noise at the edge of the image.
Description Author affiliation :: Utah Univ., Salt Lake City, UT, USA
ISSN 02780062
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2004-06-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 23
Issue Number 6
Size (in Bytes) 315.89 kB
Page Count 6
Starting Page 690
Ending Page 695


Source: IEEE Xplore Digital Library