Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal contours are unremarkable . Streaky ill - defined opacities within the lung bases , more so on the left than on the right could reflect infection , aspiration , or atelectasis . No large pleural effusion or pneumothorax is present . There no overt pulmonary edema is seen . Mild cephalization of the left pulmonary vascular markings is noted . No acute osseous abnormalities present .
    OUTPUT:
    
Bibasilar ill - defined opacities which could reflect infection , atelectasis or aspiration .