Liver CT Multiphase Image Registration and a Fast Algorithm for Its Numerical Approximation

Abstract Contrast-enhanced multiphase liver CT is currently a standard of practice in hepatic imaging for medical diagnosis of liver diseases. We presented a novel image registration method for liver CT multiphase images. Firstly, a biomechanical model is proposed to describe the procedure of image registration, and expressed by an energy function. Then the numerical approximation of the energy function based on three dimensional Level-Set method is implemented which is accelerated by Compute Unified Device Architecture (CUDA) to make sure that our method can meet the clinical real-time requirement. Experiments show that our method can accurately register liver CT multiphase images. And compared with other algorithm, our method is much faster, and higher the image resolution is, bigger the speed-up ration is.