Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable chest radiograph was obtained . Lung volumes are low but clear . The hila appear mildly enlarged . No effusion or pneumothorax is present . There are degenerative changes of the left shoulder .
    OUTPUT:
    
No acute cardiopulmonary process . The hila should be re-evaluated on follow - up imaging .