In this study, a total of 303 patients with pulmonary nodules were retrospectively recruited from June 1, 2017 to May 30, 2020 at Beilun Second People’s Hospital. The patients were identified according to the recruitment pathway (Figure 1 ). Finally, a total of 134 patients (46 males and 88 females, age 59.46±10.48 years) who met the inclusion criteria were enrolled in the study (Table 1 ).
As for the lung phantom, all images of patients were performed on the Philips Brilliance 16 slice CT scanner. The scanning parameters were also the same as those of the phantom data: conventional and target scanning. However, the patients were not retested because of the radiation dose. The voxel sizes of clinical data were 0.62×0.62×2.00–0.77×0.77×2.00 and 0.15×0.15×1.00–0.23×0.23×1.00 mm3, respectively (details inTable S1 ). A flow diagram of this study is shown in Figure 2 .
As for the lung phantom, all images of patients were performed on the Philips Brilliance 16 slice CT scanner. The scanning parameters were also the same as those of the phantom data: conventional and target scanning. However, the patients were not retested because of the radiation dose. The voxel sizes of clinical data were 0.62×0.62×2.00–0.77×0.77×2.00 and 0.15×0.15×1.00–0.23×0.23×1.00 mm3, respectively (details in