Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is increased in size from ___ study which is likely exaggerated by low lung volumes . The hilar silhouettes are normal . There are no pleural effusions or pneumothorax . There is opacification of the right lower lung which could represent pulmonary vascular congestion , though given unilateral appearance and absence of pleural effusion raises the concern of developing pneumonia . .
    OUTPUT:
    
Right lower lung opacification concerning for developing pneumonia .