This package provides MATLAB code which is associated with the following paper for review: Yu Liu, Chao Zhang, Chang Li, Juan Cheng, Yadong Zhang, Tao Song, Liang Zhao, Xun Chen, "A Practical PET/CT Data Visualization Method with Dual-Threshold PET Colorization and Image Fusion", submitted to Computers in Biology and Medicine. The package include: 1) A set of source ".m" files: the main file is demo.file 2) The folder "images": a pair of PET and CT slices for testing 3）The folder "results": the results of ClearCanvas and the proposed method Don't hesitate to contact me if you meet any problems when using this code. Contact Information: Yu Liu, Ph. D., Associate Professor, Department of Biomedical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, Anhui, China. Email: yuliu@hfut.edu.cn Homepage: https://sites.google.com/site/yuliu316316/; https://github.com/yuliu316316