Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta demonstrates atherosclerotic calcifications with unchanged dilatation of the ascending aorta . Hilar contours are normal . The pulmonary vasculature is normal . Extensive bronchiectasis with a basal predominance is re - demonstrated with slight worsening of bibasilar airspace opacities , findings concerning for infection . No pleural effusion or pneumothorax is present . No acute osseous abnormality is identified .
    OUTPUT:
    
Severe basal predominant bronchiectasis with increasing bibasilar airspace opacities , concerning for infection .