Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . Patchy ill - defined opacities are present in both lung bases , more pronounced on the left , concerning for multifocal pneumonia . No pleural effusion or pneumothorax is detected . There is no pulmonary vascular engorgement . No acute osseous abnormalities seen .
    OUTPUT:
    
Patchy bibasilar airspace opacities concerning for multifocal pneumonia .