Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well - expanded and clear . The cardiomediastinal silhouette is unremarkable . There is no pleural effusion , pulmonary edema , pneumothorax , or focal consolidation . Trace atelectasis is present in the left lung base . No displaced rib fractures are noted .
    OUTPUT:
    
No acute cardiopulmonary pathology .