Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Retrocardiac opacity is seen and may be due to atelectasis although blossoming infection or aspiration is possible . Pulmonary vascular congestion is also noted . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Retrocardiac opacity potentially atelectasis although blossoming infection is possible . Pulmonary vascular congestion .