Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is top normal , unchanged . Mediastinal and hilar contours are similar . Pulmonary vasculature is not engorged . Patchy atelectasis is noted in lung bases without focal consolidation . No pleural effusion or pneumothorax is seen . Eventration of the right hemidiaphragm is unchanged .
    OUTPUT:
    
Mild bibasilar atelectasis .