Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is borderline enlarged , but the size is accentuated due to low lung volumes . Mediastinal and hilar contours are unremarkable . Lungs are clear . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
No acute cardiopulmonary process .