Objective:To provide evidence for the physical examination of the subjects in pilot selection, aircraft transferring and normal health check by analyzing the applicability of low-dose chest CT in pulmonary nodule diagnose.Methods:The flying personnel who received the physical examination in Air Force Healthcare Center for Special Services, Hangzhou from December of 2018 to May of 2019 were enrolled in this prospective study. They were randomly divided into observation group and control group by a random number table. The subjects of observation group underwent low dose chest CT, while the subjects of control group underwent routine chest X-ray examination. The detection rate of pulmonary nodules and its influence rate on medical identification were respectively compared between 2 groups. Subgroup analysis based on the size, density, quantity and benign or malignant of pulmonary nodules were also analyzed between 2 groups.Results:A total of 238 flying personnel were enrolled down to each group of 119 subjects. There was no significant difference in age, height, weight, flying hours, flight post and aircraft type between observation group and control group. The detection rate of pulmonary nodules in observation group (41.18%) was significantly higher than that in control group (10.08%) ( P<0.05). The influence rate of pulmonary nodules detection on medical identification in observation group (24.45%) was higher than that in control group (16.67%), but it has no statistical significance ( P>0.05). Subgroup analysis showed that observation group had significantly higher detection rate of pulmonary nodule and ground-glass nodule which had the diameter smaller than 3 mm ( P<0.05). Compared with control group, there was no statistical difference on the detection rate of pulmonary multiple nodules and malignant nodules ( P>0.05). Conclusions:For screening pulmonary nodules in flying personnel, low-dose chest CT is obviously superior to routine chest X-ray examination and can provide better imaging basis for the medical evaluation of flying personnel.

Objective:To provide evidence for the physical examination of the subjects in pilot selection, aircraft transferring and normal health check by analyzing the applicability of low-dose chest CT in pulmonary nodule diagnose.Methods:The flying personnel who received the physical examination in Air Force Healthcare Center for Special Services, Hangzhou from December of 2018 to May of 2019 were enrolled in this prospective study. They were randomly divided into observation group and control group by a random number table. The subjects of observation group underwent low dose chest CT, while the subjects of control group underwent routine chest X-ray examination. The detection rate of pulmonary nodules and its influence rate on medical identification were respectively compared between 2 groups. Subgroup analysis based on the size, density, quantity and benign or malignant of pulmonary nodules were also analyzed between 2 groups.Results:A total of 238 flying personnel were enrolled down to each group of 119 subjects. There was no significant difference in age, height, weight, flying hours, flight post and aircraft type between observation group and control group. The detection rate of pulmonary nodules in observation group (41.18%) was significantly higher than that in control group (10.08%) ( P<0.05). The influence rate of pulmonary nodules detection on medical identification in observation group (24.45%) was higher than that in control group (16.67%), but it has no statistical significance ( P>0.05). Subgroup analysis showed that observation group had significantly higher detection rate of pulmonary nodule and ground-glass nodule which had the diameter smaller than 3 mm ( P<0.05). Compared with control group, there was no statistical difference on the detection rate of pulmonary multiple nodules and malignant nodules ( P>0.05). Conclusions:For screening pulmonary nodules in flying personnel, low-dose chest CT is obviously superior to routine chest X-ray examination and can provide better imaging basis for the medical evaluation of flying personnel.