Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are slightly low . There is mild atelectasis at the left base . The heart is top normal . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . There is no pulmonary edema .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality .