Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is minimal left lower lung atelectasis . The lungs are otherwise clear . Mild cardiomegaly is not significantly changed . There are no pleural effusions . No pneumothorax is seen . The descending thoracic aorta is mildly tortuous , not significantly changed .
    OUTPUT:
    
1 . No acute cardiac or pulmonary findings . 2 . Unchanged mild cardiomegaly .