Imaging analyses
tumor, primary tumors
TUMOR, PRIMARY TUMORS
Primary tumor segmentation of all pre- and post-treatment FDG PET images was computed using the gradient-based segmentation method (‘PET edge’) of MIM version 6.4 (MIM software, Inc., Cleveland, OH, USA). Only primary tumors were analyzed in this study. A total of 72 quantitative radiomic features were extracted from the PET images using Chang-Gung Image Texture Analysis (CGITA) toolbox