Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs were provided . Lung volumes are slightly low . There is no focal consolidation , pleural effusion , or pneumothorax . There is bibasilar linear atelectasis . The cardiomediastinal silhouette is notable for a likely dilated or tortuous ascending aorta . The heart is not enlarged . Imaged upper abdomen is unremarkable . The bones are intact .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Likely dilated or tortuous ascending aorta .