Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Trace right apical pneumothorax is unchanged since ___ . No focal consolidation or pleural effusion . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pleural effusion . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Trace right apical pneumothorax is unchanged since ___ exam .