GPU-accelerated, gradient-free MI deformable registration for atlas-based MR brain image segmentation. - Xiao Han; Lyndon S. Hibbard; Virgil Willcut (CVPR Workshops, 2009)

An Efficient Inverse-Consistent Diffeomorphic Image Registration Method for Prostate Adaptive Radiotherapy. - Xiao Han; Lyndon S. Hibbard; Virgil Willcut (Prostate Cancer Imaging, 2010)