Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . Ill - defined parenchymal opacities are noted bilaterally , most pronounced within both lung bases , concerning for multifocal pneumonia . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Findings concerning for multifocal pneumonia . Followup radiographs after treatment are recommended to ensure resolution of this finding .