Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs . Heart size is top - normal . Mediastinal and hilar contours are otherwise unremarkable . Elevation and flattening of the left diaphragmatic pleural surface , is due to pleural scarring , reflected in blunting of the pleural sulcus and calcification .
    OUTPUT:
    
No pneumonia . Left pleural scarring .