Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior study , cardiomediastinal silhouette is stable . Perihilar and bibasilar opacities with air bronchograms are stable on the left and probably slightly increased on the right . Lung volumes remain low . Small bilateral pleural effusions are possible . There is no pneumothorax .
    OUTPUT:
    
Persistent low lung volumes and bibasilar atelectasis on a background of mild pulmonary interstitial edema , overall similar to the prior examination .