Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided demonstrating no focal consolidation , effusion or pneumothorax . The cardiomediastinal silhouette appears normal . Subtle opacities projecting over the lower lungs are most compatible with subsegmental atelectasis . No effusion or pneumothorax is seen . Biapical pleural parenchymal scarring is noted .
    OUTPUT:
    
No acute osseous abnormality .