Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mediastinal contours are unchanged . Chronic parenchymal changes related to COPD are noted . There is slightly increased opacification along the left heart border and the retrocardiac region . There is no pleural effusion , or pneumothorax . Mid thoracic compression deformities are unchanged .
    OUTPUT:
    
Chronic changes related to COPD . Slightly increased opacification along the left heart border appears new or more pronounced than on ___ could represent an early infectious infiltrate and should becorrelated clinically .