NC2C-TransCycleGAN: Non-Contrast to Contrast-Enhanced CT Image Synthesis Using Transformer CycleGAN Journal title: Healthcraft Frontiers Authors: Xiaoxue Hou, Ruibo Liu, Youzhi Zhang, Xuerong Han, Jiachuan He, He Ma Subject(s): Health Psychology/Behavioral Medicine, Health Care Sciences & Services, Health Policy & Services, Health science