2.1. Study design
According to the requirements of the clinical trial protocol, this clinical trial was carried out in three medical centers (Center A, Center B, and Center C) in Shanghai and Wuhan, China, from 1 April 2018 to 1 September 2018.This is a prospective, multicenter, randomized, paired-design clinical trial. Subjects were numbered sequentially according to the admission number and randomly assigned to group A and group B according to the randomized grouping scheme, in which group A was carried out by the robot measurement first and then by the control method; for the patients who were in group B, they measured vital signs and radiation dose rate by the control method first and then by robots.