Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is not engorged . Patchy bibasilar airspace opacities may reflect pneumonia or aspiration . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Bibasilar airspace opacities concerning for pneumonia or aspiration . Followup radiographs after treatment are recommended to ensure resolution of this finding .