Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged but unchanged . Mediastinal contour is on similar . Low lung volumes resulting in crowding of bronchovascular structures , but there is no overt pulmonary edema . Patchy atelectasis is noted in the lung bases . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is seen .
    OUTPUT:
    
Low lung volumes with mild patchy opacities in lung bases likely reflective of atelectasis .