Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The ascending aortic contour is mildly prominent . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is normal . Minimal streaky opacity is noted in the left lower lobe most likely reflective of atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Minimal streaky opacity in the left lower lobe likely reflective of atelectasis .