Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes and a poor inspiratory effort . In comparison to prior radiograph , the cardiomediastinal silhouettes are stable . The bilateral hila are unremarkable . As on prior study , bronchovascular prominence likely relates to low lung volumes . There is no evidence of focal lung consolidation . There is no pulmonary vascular congestion . There is no pneumothorax or effusion .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Stable chest x-ray . Limited by low lung volumes .