Fig. 1

A Criteria for excluding scans. A total of 45 patients with lesions were studied retrospectively, including 21 patients with lung cancer, 6 patients with infection or inflammation, 13 patients with mediastinal lesions, and 5 patients with liver cancer as the primary suspicious lesion. B Scan protocol. A 65-min list-mode acquisition was initiated immediately after the bolus injection of FDG on a uEXPLORER PET/CT scanner. The acquired data were binned into 67 frames (5 s × 24, 10 s × 6, 30 s × 6, 60 s × 6, 120 s × 24, and 300 s × 1), for which the last frame was treated as a regular SUV image. The average start time of the delay scan was 145 min and lasted for 10 min