Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . Streaky opacity within the left lung base with suggestion of bronchiectasis and airway wall thickening is noted . Right lung is clear . No pleural effusion , focal consolidation or pneumothorax is seen . No acute osseous abnormality is identified .
    OUTPUT:
    
Streaky left basilar opacity with suggestion of bronchiectasis and air wall thickening may be due to an infectious process .