Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are very low lung volumes , likely accentuating the size of the cardiomediastinal silhouette . Hila are not well assessed , likely within normal limits . New since prior exam is a left lower lung opacity with air bronchograms , concerning for pneumonia . Patchy right mid lung opacities likely reflect atelectasis . There is no pneumothorax . There is probably a small left pleural effusion . There is no right pleural effusion . Surgical clips are seen scattered over the left hemiabdomen .
    OUTPUT:
    
Left lower lung pneumonia and a small left parapneumonic pleural effusion .