Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated selected of COPD . Biapical scarring is also noted . There is a left retrocardiac opacity concerning for pneumonia . There is no pleural effusion , pulmonary edema or pneumothorax . The heart is normal in size .
    OUTPUT:
    
Left retrocardiac opacity seen on the lateral radiograph concerning for pneumonia . Recommend follow - up radiographs in ___ weeks following treatment of pneumonia .