Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior exam dated ___ , there has been interval development of multifocal airspace opacities at the right lung base , left lung base , and within the retrocardiac space . There is persistent increased interstitial markings and evidence of upper lobe predominant emphysema . Probable small bilateral pleural effusions are noted . There is no evidence of pneumothorax . The patient is status post CABG with intact sternotomy wires noted . The cardiomediastinal silhouette is unchanged . No acute osseous abnormalities are detected .
    OUTPUT:
    
Interval development of multiple bilateral airspace opacities , compatible with multifocal pneumonia .