Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate no focal opacity convincing for pneumonia . Elevation of the right hemidiaphragm appears to been present on prior study dated ___ . Cardiomediastinal and hilar contours are within normal limits . A left chest wall Port - A - Cath is again identified , a catheter tip terminating in the low superior vena cava . There is no pleural effusion or pneumothorax . Visualized osseous structures are without an acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality .