Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are again low . There is no effusion or pneumothorax . Medial right upper lobe mass is similar to prior . Superior right lower lobe opacity is similar to prior . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Right upper lobe mass was better evaluated on recent CT chest . 3 . Right lower lobe opacity thought to represent postradiation change is similar to prior .