Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low which accentuates the size of the cardiac silhouette which is borderline enlarged . Mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Minimal patchy opacities in the lung bases likely reflect atelectasis in the setting of low lung volumes . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .