Title :
Rotational convolution and SPECT post processing
Author :
Zeng, Gengsheng L.
Author_Institution :
Dept. of Radiol., Univ. of Utah, Salt Lake City, UT, USA
fDate :
Oct. 24 2009-Nov. 1 2009
Abstract :
In many imaging systems, the point spread function (PSF) is non-stationary. Usually a computation-intensive iterative algorithm is used to de-blur the non-stationary PSF. This paper presents a new idea of using a non-iterative method to compensate for the spatially variant PSF. This method first further blurs the image with a non-stationary kernel so that the resultant image has a stationary PSF, then deblurs the resultant image using an efficient decovolution technique. The proposed method is illustrated and implemented by SPECT (single photon emission computed tomography) applications.
Keywords :
deconvolution; image restoration; medical image processing; optical transfer function; single photon emission computed tomography; SPECT post processing; computation-intensive iterative algorithm; decovolution technique; imaging systems; nonstationary PSF; nonstationary kernel; point spread function; rotational convolution; single photon emission computed tomography; spatially variant PSF; Attenuation; Collimators; Convolution; Filters; Frequency; Image reconstruction; Iterative algorithms; Iterative methods; Kernel; Single photon emission computed tomography;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-3961-4
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2009.5401716