Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Lung volumes are low . Central pulmonary vascular congestion is simulated by low lung volumes on AP view , not seen on lateral view with improved inspiration . Lungs are clear . Pleural surfaces are clear without effusion pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .