Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is top - normal in size . The cardiomediastinal and hilar contours are within normal limits . Bilateral air space opacities are significantly increased from the study done in ___ and suggest pulmonary edema , right greater than left . Evaluation is somewhat limited due to extensive bilateral airspace opacities however there may be possible small cavitary lesions involving the right lung . Underlying infection should be considered in the appropriate clinical setting . There is no pleural effusion or pneumothorax identified .
    OUTPUT:
    
Bilateral airspace opacities , right greater than left suggest moderate to severe pulmonary edema . Underlying infection should be considered in the appropriate clinical setting . Possible small cavitary lesions involving the right upper lobe . Consider CT for further evaluation when clinically appropriate .