Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contour appears unchanged with stable rightward mediastinal shift . New , bibasilar opacities may reflect atelectasis or pneumonia , in the appropriate clinical setting . Blunting of the left costophrenic sulcus may reflect a small pleural effusion . There is no pneumothorax . There is no pulmonary vascular congestion .
    OUTPUT:
    
New , bibasilar opacities may reflect atelectasis or pneumonia , in the appropriate clinical setting .