Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes with bibasilar atelectasis . As mentioned on the prior study , bibasilar linear template leg opacities favor atelectasis but differential diagnosis includes infectious pneumonia or aspiration . No pleural effusion is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . A catheter is partially imaged projecting over the upper abdomen .
    OUTPUT:
    
Low lung volumes with likely bibasilar atelectasis . Platelike and linear basilar opacities favor atelectasis , but as also mentioned on the prior study , infectious pneumonia or aspiration are also in the differential .