Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is retrocardiac opacity , better appreciated on the lateral view , possibly localized to the lateral right lower lobe . There is no pleural abnormality . The heart is top - normal in size . There is no mediastinal or hilar abnormality .
    OUTPUT:
    
Lower lobe pneumonia , likely localized to the lateral right lower lobe . Repeat chest radiograph in 4 weeks following antibiotic therapy is recommended for documentation of resolution .