Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right chest wall port is unchanged from chest CT ___ . Bilateral upper and lower lung nodules are consistent with metastasis , but are better characterized on prior chest CT dated ___ . There is no definite new parenchymal opacity . There is no pleural effusion or pneumothorax . An aortic valve replacement and median sternotomy wires are imaged . Right lung linear opacity represents scarring as seen on previous CT .
    OUTPUT:
    
1 . No radiographic evidence for pneumonia . 2 . Presumed metastases are better assessed on previous chest CT .