Risk analysis in peripheral clinical T1 non-small cell lung cancer correlations between tumor-to-blood standardized uptake ratio on 18F-FDG PET-CT and primary tumor pathological invasiveness: a real-world observational study - Li, Xiao-Feng; Shi, Yun-Mei; Niu, Rong; Shao, Xiao-Nan; Wang, Jian-Feng; Shao, Xiao-Liang; Zhang, Fei-Fei; Wang, Yue-Tao (Quantitative Imaging in Medicine and Surgery, 2021)