Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar atelectasis , but no focal consolidations . The pulmonary vasculature is normal . There is moderate enlargement of the cardiac and mediastinal silhouettes , likely due to a combination of a tortuous aorta and mediastinal lipomatosis . No pleural effusion . No pneumothorax . Moderate scoliosis .
    OUTPUT:
    
Bibasilar atelectasis , but no focal consolidations . Moderate enlargement of the mediastinal silhouette , likely due to a tortuous aorta and mediastinal lipomatosis .