Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is a patchy a new opacity in the left lower lobe with a small pleural effusion concerning for pneumonia . Very mild new interstitial process suggests coinciding fluid overload or airway inflammation . There is no evidence for pleural effusion on the right .
    OUTPUT:
    
Opacity in the left lower lobe suggestive of pneumonia . New mild interstitial process .