Fig. 6

The risk scores of COPD in two patients were calculated by using the nomogram. a Thin-slice chest CT images of non-COPD in a 45-year-old woman with height 152 cm, non-smoker, Radscore -2.08. b Lung density analysis diagram showed no emphysema area in both lungs. c The nomogram shows that the total score was 44.8 points, corresponding to the probability of developing COPD is approximately 8.0%. Lung function examination showed that FEV1/FVC = 0.8. d Thin-slice chest CT image of COPD in an 82-year-old female subject. She is 152 cm tall, non-smoker, and has a Radscore of 3.17. e Lung density analysis diagram showed that both lungs are mostly scattered in the emphysema area (red). f The total score of the nomogram was 48.2, corresponding to the probability of developing COPD of approximately 96.9%. Pulmonary function examination showed that FEV1/FVC = 0.6. COPD chronic obstructive pulmonary disease, CT computed tomography, FEV1/FVC ratio of forced expiratory volume in 1 s to forced vital capacity