Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple AP chest radiographs are considerably rotated to the left . Moderate cardiomegaly and hyperexpansion are unchanged dating back to ___ . Subtle opacity at the right lung baseis again seen , however it is unclear if this is due to technical factors . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle right lower lobe opacity may be due to technical factors . Recommend repeating this radiograph with better positioning .