Title :
Revisit of the ramp filter
Author :
Gengsheng L. Zeng
Author_Institution :
Department of Electrical Engineering, Weber State University, Ogden, UT 84408 USA
Abstract :
An important part of the filtered backprojection (FBP) algorithm is the ramp filter. This paper derives the discrete version of the ramp filter in the Fourier domain and studies the windowing effects. When a window function is used to control the noise, the image amplitude will be affected and reduced. A simple remedy is proposed to improve the image accuracy when a window function must be used.
Keywords :
"Filtering algorithms","Manganese","Indexes","Image reconstruction","Signal processing","Linear systems"
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2014 IEEE
DOI :
10.1109/NSSMIC.2014.7430796
