Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright portable view of the chest demonstrates moderate right pleural effusion with likely subpulmonic component . Right lung base opacities most likely represent atelectasis . Left lung is essentially clear . There is no left pleural effusion . Hilar and mediastinal silhouettes are otherwise unremarkable . Heart size is normal . No pneumothorax .
    OUTPUT:
    
Moderate right pleural effusion has increased in size since ___ .