Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size with dextra positioning . The mediastinal and hilar contours appear unchanged . Patchy vague opacities are present at the lung bases , but similar to prior studies , suggesting minor scarring . Mild relative elevation of the left hemidiaphragm appears similar . There is no pleural effusion or pneumothorax . An air - fluid level is present in the stomach . Surgical clips project beneath the left hemidiaphragm . Bony structures are unremarkable .
    OUTPUT:
    
Mild gastric distention with an air - fluid level . Patchy basilar opacities most suggestive of minor scarring , little if at all changed .