Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP upright view of the chest was obtained . Patient appears rotated . Pacemaker over the left chest , leads unchanged in positions . Cardiomediastinal silhouette is stable . There is no focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .