Medical Image Registration Based on Improved I_α-information
HU Shun-bo · Journal of Optoelectronics·laser · 2007
In order to reduce the computational time and misregistration of mutual information in medical image registration,two improved Iα-information measures,named as FNIα information measure and SNIα information measure,were proposed.The function curves,computing time and convergence were studied by applying the following measures to rigid registration of computed tomorgrphy(CT)/magnetic resonance(MR) and MR/positron emission tomography(PET) images.The measures include V-information,mutual information,I-alpha information,FNIα information and SNIα information.The resutls of tests show that the FNIα information outperforms mutual information and other measures in convergence performance,and the computational of SNIα information is faster than that of mutual information.