Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single frontal view of the chest was obtained portably . The lungs are well expanded and clear without focal consolidation , pleural effusion or pneumothorax . Heart size is upper limits of normal . Mediastinal silhouette and hilar contours are normal aside from mild aortic tortuosity . A linear hyperdensity projecting over the left upper quadrant may represent a surgical clip . Healed right posterior rib fractures are noted .
    OUTPUT:
    
No pneumonia , edema , or effusion .