Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear , well - expanded lungs without pleural effusion or pneumothorax . There is minimal linear atelectasis seen in the left lower lung . Cardiac silhouette remains normal in size , the mediastinal contours remain normal . The pulmonary vasculature is normal . VP shunt tubing is noted .
    OUTPUT:
    
Opacities most consistent with subsegmental atelectasis , without other acute chest abnormality .