Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , residual opacities are seen in the right lower lung and retrocardiac region , which could represent pneumonia . The heart size is unchanged . No pulmonary edema , pneumothorax , or pleural effusion .
    OUTPUT:
    
Residual opacities are seen in the right lower lung and retrocardiac region , which could represent pneumonia .