Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small right and loculated moderate left pleural effusions are unchanged . There has been interval increase in right mid lung perihilar airspace opacities as compared to the ___ chest radiograph , which may be due to aspiration or worsening infection . The cardiomediastinal silhouette is stable . Increased retrocardiac airspace opacification may be due to worsening atelectasis , however aspiration or infection also can not be excluded .
    OUTPUT:
    
Increased bilateral airspace opacities may be due to aspiration or worsening infection . Stable small right and moderate loculated left pleural effusions .