Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . Mediastinal and hilar contours are unremarkable . Linear opacities in the lower left lower lobe are compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . There is no free air are identified under the diaphragms . No acute osseous abnormalities are visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No free air under the diaphragms . Left lower lobe subsegmental atelectasis .