Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large region of consolidation extends from the right apex to the perihilar right mid lung . There are extensive ' homogenously heterogenous ' opacities throughout the remainder of the right Lung . This may represent an acute pneumonia superimposed on severe COPD . The chronicity of these changes is unclear as there are differences in technique between today 's study and the thoracic spine radiograph ___ . There is no pleural effusion or pneumothorax . The cardiomediastinal borders and the hilar structures are normal . Cardiac size is normal .
    OUTPUT:
    
Severe consolidative and conceivably interstitial process of the right lung of unknown chronicity . Consider severe pneumonia first