Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are similar with atherosclerotic calcifications again seen at the aortic knob . No pulmonary edema is present . Lungs remain hyperinflated . Linear and patchy bibasilar opacities likely reflect areas of atelectasis . No pleural effusion or pneumothorax is seen . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Bibasilar atelectasis . No new focal consolidation .