Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes and basilar atelectasis . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable and unremarkable .
    OUTPUT:
    
Mild bibasilar atelectasis without definite acute cardiopulmonary process .