Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , the left apical pneumothorax is mildly improved . Again seen is the right breast partially calcified prothesis and calcifications of the right apex with scarring . The left sixth and seventh posterior rib fractures are again seen . There is no consolidation , pleural effusion , or pneumothorax . Cardiomediastinal borders and hilar structures are normal . Cardiac size is normal .
    OUTPUT:
    
Mildly improved left apical pneumothorax since ___ .