Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . An overlying the external pacer wire is seen . A nodular density in the right lower lung likely represents a nipple shadow . The lungs are clear without focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette appears normal . Bony structures appear intact . No free air is seen below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .