Title :
Quantification of spatial correlation in X-ray CT and MR images
Author :
Lei, Tianhu ; Udupa, Jayaram K.
Abstract :
Characterizing the pixel relationship in image has been a basic issue in image reconstruction and processing. Quantitative assessments on spatial correlation of X-ray CT and MR images are presented in this paper. In image domain, X-ray CT and MR images is proved to be asymptotically independent, and a unified formula for the magnitude of correlation coefficient of pixels in these images is given. In spectrum domain, autocorrelation function (acf) and spectral density function (sdf) of X-ray CT and MR images are derived and have been verified by the results obtained from large number of real, experimental MR data.
Keywords :
Markov processes; biomedical MRI; computerised tomography; image reconstruction; MR images; X-ray CT images; autocorrelation function; correlation coefficient; image processing; image reconstruction; pixel relationship; spatial correlation; spectral density function; spectrum domain; Computed tomography; Density functional theory; Image reconstruction; Layout; Magnetic resonance imaging; Markov random fields; Pixel; Statistical analysis; Stochastic processes; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2002 IEEE
Print_ISBN :
0-7803-7636-6
DOI :
10.1109/NSSMIC.2002.1239512
