Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an increased opacity in the retrocardiac region as well as increased opacity in the right lower lobe . Otherwise , the remainder of the lungs are clear . Cardiomediastinal silhouette is normal . No acute fractures are identified .
    OUTPUT:
    
Retrocardiac opacities which raise suspicion for pneumonia in the left lower lobe . A followup radiograph in 6 weeks is recommended to ensure resolution .