Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate low lung volumes . The lungs are clear without pleural or pericardial effusion . The cardiac silhouette is accentuated by low lung volumes and the PA technique . The mediastinal contours are normal . Buckling of the trachea might be due to goiter or an esophageal diverticulum .
    OUTPUT:
    
1 . Tracheal deviation might be due to goiter or esophageal diverticulum . 2 . No acute chest pathology . Findings were discussed with Dr . ___ at 8 : 15 am by phone .