Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to chest radiograph from 1 day prior , given for differences in technique , small right apical pneumothorax has marginally decreased . Right - sided effusion has slightly decreased . Subsegmental atelectasis in the right lower lobe has also decreased . The left lung is clear . Right - sided Port - A - Cath terminates in the low SVC .
    OUTPUT:
    
Tiny right apical pneumothorax , slightly decreased .