Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates a stable cardiomediastinal silhouette as seen on prior examinations , with mediastinal widening . An elevated right hemidiaphragm is again seen . The left lung base is not visualized . No focal consolidation is identified in the visualized lung fields . Given supine technique , it is difficult assess for pleural effusion or pneumothorax .
    OUTPUT:
    
No significant change since recent prior .