Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Minimal patchy opacities are seen in the lung bases , more so on the left . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Minimal patchy opacities in the lung bases , likely atelectasis , however infection within the left lung base is not completely excluded in the correct clinical setting .