Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is blunting of the left costophrenic angle with pleural thickening seen which is most likely due to pleural thickening , stable since at least ___ . Mild left base scarring is seen . Subtle left base opacity seen on the frontal view , not substantiated on the lateral view , is stable since at least ___ and likely due to atelectasis / scarring . The aorta is calcified and tortuous . The cardiac silhouette is top normal . No overt pulmonary edema .
    OUTPUT:
    
No significant interval change .