Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacity in the left retrocardiac region has resolved . Subtle increased asymmetric opacity in the right lower lobe with corresponding increased retrocardiac opacity on the lateral view over the spine , could reflect an early pneumonia in the appropriate clinical situation . The cardiomediastinal silhouette is unchanged . No pleural effusion or edema . No pneumothorax .
    OUTPUT:
    
Findings concerning for focal right lower lobe pneumonia .