Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to chest radiograph from the same day , multifocal central opacities have marginally improved in the right upper lobe . The remaining opacities have not substantially changed . Minimal bilateral effusions . Heart size is top - normal . No pneumothorax .
    OUTPUT:
    
Slight improvement of right upper lobe opacity , remaining multifocal opacities have not substantially changed , likely a combination of multifocal pneumonia and edema .