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In Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society

Magnetic Resonance Imaging (MRI) guided Radiation Therapy is a hot topic in the current studies of radiotherapy planning, which requires using MRI to generate synthetic Computed Tomography (sCT). Despite recent progress in image-to-image translation, it remains challenging to apply such techniques to generate high-quality medical images. This paper proposes a novel framework named Multi-Cycle GAN, which uses the Pseudo-Cycle Consistent module to control the consistency of generation and the domain control module to provide additional identical constraints. Besides, we design a new generator named Z-Net to improve the accuracy of anatomy details. Extensive experiments show that Multi-Cycle GAN outperforms state-of-the-art CT synthesis methods such as Cycle GAN, which improves MAE to 0.0416, ME to 0.0340, PSNR to 39.1053.

Liu Yanxia, Chen Anni, Shi Hongyu, Huang Sijuan, Zheng Wanjia, Liu Zhiqiang, Zhang Qin, Yang Xin

2021-Jun-26

CT synthesis, Cycle GAN, Deep learning, MRI