Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Subtle bibasilar opacities are again seen and are minimally improved from the prior study . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Bibasilar opacities , left greater than right , are minimally improved from the prior study . Recommend followup chest radiograph in 4 weeks and if not fully resolved at that time , consider CT evaluation of the chest .