Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes and mild basilar atelectasis . Difficult to exclude a trace left pleural effusion . No definite focal consolidation is seen . The cardiac and mediastinal silhouettes are stable . No pneumothorax is seen .
    OUTPUT:
    
Basilar atelectasis , can not exclude trace left pleural effusion .