Table 1. Clinical indications for the control group.

No.	Clinical indications for CT scans	Number of cases
1	Bronchopulmonary cyst	72
2	Pulmonary abscess	65
3	Mediastinal mass	59
4	Bronchopneumonia	39
5	Trauma	35
6	Pulmonary tumors	28
7	Empyema	23
8	Diaphragmatic eventration	19
9	Esophageal cyst	6
10	Chylothorax	5