Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiograph obtained ___ , no significant changes are appreciated . Severe hyperinflation is unchanged . Large retrosternal airspace and diaphragmatic flattening is unchanged since at least ___ . Lungs are otherwise clear without focal consolidation or suspicious pulmonary nodules . Heart size is normal without pulmonary vascular congestion or pulmonary edema . Pleural surfaces are normal . Mild thoracolumbar scoliosis is unchanged .
    OUTPUT:
    
No radiographic evidence of pneumonia or other acute cardiopulmonary abnormalities .