Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph , lung volumes are decreased . The heart appears enlarged . There is increased density of the right lung base with interstitial abnormalities . There is no pneumothorax .
    OUTPUT:
    
Low lung volumes with increased density of the right lung base and interstitial abnormalities which could relate to an infectious process however metastasis can not be excluded . CT is recommended for evaluation .