Title :
Image enhancement and processing for positron emission tomography
Author :
Abidi, M.A. ; Davis, P.B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Tennessee Univ., Knoxville, TN, USA
Abstract :
A filtering method for positron emission tomography is proposed. The image is converted from the rectangular x-y coordinate system to the polar ρ-θ coordinate system. This causes the radial noise to map into horizontal lines. Using the Fourier transform, radial noise is then mapped into and around the vertical axis of the Fourier spectrum in the corresponding ω-θ space. A class of filters is designed and applied to these images. The filtered images are then converted back to a rectangular coordinate system for display and examination. This method has been tested using both synthetic and real data. The corrected images show minor residual noise and practically no loss of information around the heart wall
Keywords :
Fourier transforms; computerised picture processing; filtering and prediction theory; medical diagnostic computing; radioisotope scanning and imaging; Fourier spectrum; Fourier transform; computerised picture processing; filtering; image enhancement; positron emission tomography; radial noise; rectangular coordinate system; Biomedical imaging; Diseases; Filtering; Filters; Frequency; Image analysis; Image converters; Image enhancement; Mathematical model; Positron emission tomography;
Conference_Titel :
System Theory, 1989. Proceedings., Twenty-First Southeastern Symposium on
Conference_Location :
Tallahassee, FL
Print_ISBN :
0-8186-1933-3
DOI :
10.1109/SSST.1989.72521