Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are bibasilar opacities , left greater than right , which could be due to pneumonia , aspiration , or in part due to atelectasis . No overt pulmonary edema is seen . There is no large pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Bibasilar opacities could be due to pneumonia or aspiration versus atelectasis .