Fig. 1From: The diagnostic performance and clinical value of deep learning-based nodule detection system concerning influence of location of pulmonary noduleSchematic diagram of the danger and non-danger zones. The lung field on the chest radiograph is divided into four regions: (1) apical, (2) lateral pulmonary, (3) paramediastinal, and (4) retrodiaphragmatic regions. Danger zone: regions 1, 3, and 4 vs. non-danger zone: region 2Back to article page