Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . This accentuates the size of the cardiac silhouette which is likely top - normal . Apparent mediastinal widening may also likely be due to poor inspiratory volumes . Pulmonary vascularity is not engorged . Patchy opacities in the lung bases likely reflect atelectasis though infection , particularly in the right lung base , can not be completely excluded . Small right pleural effusion appears to be present . There is no pneumothorax . No acute osseous abnormality is visualized .
    OUTPUT:
    
Bibasilar patchy opacities , more confluent in the right lung base . Findings could reflect atelectasis though infection , particularly in the right lung base , is not excluded . Probable small right pleural effusion .