Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , causing crowding of the pulmonary vasculature . The lungs are otherwise clear . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . The cardiomediastinal contours are normal and there is no large mass seen .
    OUTPUT:
    
No acute cardiopulmonary process .