Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear scarring at the left lung base appears unchanged . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . Heart size is mildly enlarged . The aorta is tortuous . Degenerative changes are seen in the spine .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process .