Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . A moderate size hiatal hernia is noted . Mild aortic knob calcifications are demonstrated . The pulmonary vasculature is not engorged . Streaky opacities in both lung bases likely reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is demonstrated . Mild degenerative changes in the lower thoracic spine .
    OUTPUT:
    
Moderate size hiatal hernia with streaky bibasilar opacities , likely atelectasis .