Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The aortic arch shows patchy calcification . Mild subpleural thickening is unchanged at each lung apex for the most part , but there is an apparent increase in density in the left upper lung over about 1 cm region . Otherwise , the lung fields appear clear . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary disease . 2 . Possible new left apical lung nodule . Follow - up chest CT is recommended when clinically appropriate .