Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The pulmonary vascularity is normal . Minimal patchy opacities are noted within both lung bases . These correlate to the ill - defined nodular and ground - glass opacities seen within the lung bases on the previous chest CT . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities are seen .
    OUTPUT:
    
Patchy bibasilar airspace opacities concerning for a small airways infectious process .