Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal and unchanged . The mediastinal contours are stable , and the hilar contours are within normal limits . Pulmonary vascularity is normal . There is minimal streaky opacity in the left lower lobe which may reflect an area of atelectasis . Remainder of the lungs are clear without pleural effusion or pneumothorax . Clips are seen within the right upper quadrant of the abdomen denoting prior cholecystectomy . No acute osseous abnormalities are seen .
    OUTPUT:
    
Minimal streaky opacity in the left lung base which most likely reflects atelectasis .