Title :
Cubic Splines for Filter Design in Computed Tomography
Author :
Huang, Sung-Cheng ; Phelps, Michael E. ; Hoffman, Edward J. ; Kuhl, David E.
Author_Institution :
Division of Nuclear Medicine, UCLA Medical School and Laboratory of Nuclear Medicine and Radiation Biology University of California, Los Angeles Los Angeles, California 90024
Abstract :
Application of cubic splines is investigated to provide a convenient method of designing flexible reconstruction filters for computed tomography (CT). Cubic splines were found to be compatible with the basic requirements of CT filter´s frequency response functions. An interactive computer software system was developed to implement the method of designing CT filters with cubic splines. The system was found to be convenient to use and could provide filters of various characteristics. An example is shown to illustrate the capability of the method in designing filters that can reduce noise levels in emission CT images.
Keywords :
Back; Biomedical imaging; Computed tomography; Design methodology; Filters; Frequency response; Image reconstruction; Noise level; Projection algorithms; Software systems;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1980.4331026
