Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been slight interval improvement in degree of lung inflation compared to the prior study . Heart size remains mild to moderately enlarged . Atherosclerotic calcifications are demonstrated in the aorta is mildly tortuous . As seen previously , rightward deviation of the trachea at the thoracic inlet is due to left - sided thyroid enlargement . Mediastinal and hilar contours are otherwise unchanged . Pulmonary vasculature is not engorged . Patchy opacities the lung bases may reflect atelectasis , but infection or aspiration is not excluded in the correct clinical setting . No pleural effusion or pneumothorax is detected . No acute osseous abnormality is present .
    OUTPUT:
    
Slightly improved lung volumes compared to the prior study . Persistent bibasilar patchy airspace opacities which could reflect atelectasis , though infection or aspiration is not excluded in the correct clinical setting .