Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate normal lung volume although many prior studies have shown hyperinflation , presumably due to transient bronchospasm . Mild right hilar enlargement is chronic , due to either stable adenopathy or unilateral pulmonary artery enlargement . There is no pleural abnormality . Cardiomediastinal silhouette is normal . Surgical clips are noted in the left upper quadrant .
    OUTPUT:
    
No acute chest pathology .