Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . There are increased interstitial markings within the lung bases , with a more focal opacity in the right lung base . The pulmonary vascularity appears not engorged . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities are present .
    OUTPUT:
    
Increased interstitial markings at the lung bases with more focal opacity in the right lung base which may reflect aspiration or infection .