Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Large right - sided pleural effusion with associated atelectasis is again seen and given differences in positioning and technique has not significantly changed . There is no visualized pneumothorax . The left lung remains grossly clear . Cardiac silhouette is difficult to assess given silhouetting on the right . Slightly tortuous descending thoracic aorta is noted .
    OUTPUT:
    
Large right pleural effusion , not significantly changed since yesterday 's exam .