Phase IIT Trial of SNA014

Perform whole-body PET/CT scans on the subjects at 30 minutes (± 5 minutes), 60 minutes (± 10 minutes), 120 minutes (± 20 minutes), and 240 minutes (± 30 minutes) after administration. Among them, PET scanning can be performed on 1-2 subjects in a certain dose group or each dose group for 30-60 minutes. Among the four CT scans, one CT scan is a conventional low-dose CT scan (120mA), and the remaining three are extremely low-dose CT scans (10-20mA). The main researchers and nuclear medicine physicians can decide whether to change the subsequent image acquisition time and duration of the subjects based on the image information obtained from the enrolled subjects.