Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . Patchy opacities are noted in the lung bases . No pleural effusion or pneumothorax is present though assessment is mildly limited as the left costophrenic angle was not included in the field of view . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Bibasilar patchy airspace opacities . These findings are concerning for infection or aspiration given the history of fever . Follow up radiographs after treatment are recommended to ensure resolution of these findings .