Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated are bilateral , multifocal patchy airspace opacities compatible with a diffuse infectious process . As compared to the prior examination , the right lung is slightly better aerated , whereas the left lung is essentially unchanged in appearance . There is no evidence of significant pleural effusion , pneumothorax , or frank pulmonary edema . The cardiomediastinal silhouette is stable . A right central venous line , NGT , and ETT are again seen in their expect locations . Redemonstrated are several subacute left rib fractures , better evaluated on the prior rib series .
    OUTPUT:
    
Essentially unchanged multifocal airspace opacities compatible with an infectious process . Minimal interval improved aeration of the right lung .