Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity at the bilateral lung bases which could reflect aspiration or infection . Stable heart size and thoracic aortic tortuosity . Right paratracheal soft tissues likely represent vascular structures in someone of this age . No large pleural effusion or pneumothorax . Background hyperinflation is compatible with COPD .
    OUTPUT:
    
Increased opacities at the lung bases could reflect aspiration , early infection or atelectasis .