Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low accentuating the cardiac silhouette and pulmonary vasculature . Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Subtle asymmetrically increased opacities of the right lung base . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Subtly increased opacities of the right lung base corresponding to probable pneumonia on subsequent CT .