Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is no evidence of pulmonary edema or pneumonia . Heart size is top - normal . Mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary abnormality . Specifically , no vascular congestion or pulmonary edema .