Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP chest demonstrate low lung volumes with secondary central vascular crowding . Cardiomediastinal and hilar silhouette is otherwise unremarkable . Lungs are clear without a focal consolidation . There is no pleural effusion or pneumothorax . There is no air under the right hemidiaphragm . No displaced rib fracture is seen .
    OUTPUT:
    
No acute intrathoracic abnormality . No displaced rib fractures seen . Please see same day CT torso .