Registration of Different Phases of Contrast-Enhanced Liver CT Data

There are three kinds of blood vessel systems in liver and the localization of each intrahepatic vessel system is one of the most important issues for liver surgery. In order to reconstruct all the vessels from the contrast-enhanced CT date, image registration must be adopted. In this paper, the registration of contrast-enhanced liver CT data in different phases was studied. Firstly, we proposed a method based on joint histogram to register the intrahepatic vessels. This method was evaluated by applied on two data sets, and it was shown that this method outperformed the method of mutual information in terms of speed. Then, some optimization algorithms, such as Powell, Brent, Golden Section and the Second-degree interpolation algorithms, were applied. Finally, the vessels are reconstructed in 3D.