Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small - to - moderate right apical pneumothorax is smaller since the earlier study of ___ ( the superior and lateral pleural margins now extending to third and fifth posterior ribs , previously four and sixth ribs ) . There is interval resolution of preously seen right pleural effusion . The lungs are clear , without consolidation or pulmonary edema . The cardiomediastinal and hilar contours are normal .
    OUTPUT:
    
Interval reduction in the small - to - moderate right apical pneumothorax and right pleural effusion , since ___ .