Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , and a sub - optimal inspiratory effort . The cardiomediastinal silhouettes are within normal limits . The bilateral hila are unremarkable . The lungs are clear . There is no pulmonary vascular congestion . There is no pneumothorax or pleural effusion . There is no evidence of acute fracture .
    OUTPUT:
    
No acute cardiopulmonary process . No evidence of rib fracture .