Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable upright views through the chest demonstrates left pectoral pacemaker with three leads in unchanged position . No focal consolidation is identified within the lungs . The cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . No acute osseous structures are identified .
    OUTPUT:
    
No acute intrathoracic abnormality .