Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes accentuating perihilar vascular crowding . Allowing for such , the cardiomediastinal silhouette is normal . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .