Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal . Small right apical pneumothorax is stable . The left lung is clear . Small right effusion , pleural thickening and adjacent minimal atelectasis have improved . The osseous structures are unremarkable
    OUTPUT:
    
improved aeration in the right base , decreased small right effusion and probably pleural thickening . Resolved left effusion