Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low accentuating the cardiac silhouette and pulmonary vasculature . Moderate cardiomegaly with unfolding of the thoracic aorta is stable . Mediastinal contour and left hilar contour are unremarkable . Subtly increased opacity at the inferior right hilus is seen on frontal view only , without lateral correlate . Lungs are otherwise clear . Pleural servers are clear without effusion or pneumothorax .
    OUTPUT:
    
Subtly increased opacity at the margin of the inferior right hilus is seen on frontal view only , suspicious for early or developing infection but potentially could all be explained by low lung volumes , repeat with full inspiration may be helpful .