Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . A linear opacity across the right lower lung field is compatible with subsegmental atelectasis . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Right lower lobe subsegmental atelectasis . Otherwise unremarkable chest radiographic examination .