1. A method for image distortion correction, comprising: receiving a target image and a reference image; correcting radial distortion in the target image and the reference image according to a distortion parameter; detecting feature correspondence points in the distortion corrected target image and the distortion corrected reference image; initializing an affine registration model with the feature correspondence points; minimizing vessel centerline error measure (CEM) between the distortion corrected target image and the distortion corrected reference image to determine an optimal distortion parameter and an optimal affine registration model; correcting radial distortion in the target image and the reference image according to the optimal distortion parameter; applying an affine transform to the optimally distortion corrected target image and the optimally distortion corrected reference image according to the optimal affine registration model; combining the transformed optimally distortion corrected target image and the transformed optimally distortion corrected reference image into a montage image; and outputting the montage image.