Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are minimally hyperinflated . There is no focal airspace opacity worrisome for pneumonia . The heart is not enlarged . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Curvilinear tubular structures appear to localize to the anterior chest wall , relating to the costochondral junctions .
    OUTPUT:
    
Mild hyperinflation may relate to COPD .