Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two PA and one lateral chest radiographs were obtained . Linear scarring at the left base is unchanged . No new consolidation , nodule , effusion , pneumothorax is present . Pleural thickening is mild . The cardiac and mediastinal contours are normal . The aorta is tortuous and calcified .
    OUTPUT:
    
No acute cardiopulmonary process .