Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild asymmetrical elevation of the left hemidiaphragm , of uncertain chronicity . Mild left basilar atelectasis is present . The heart is not enlarged . The aorta is markedly tortuous . There is no pneumothorax , pleural effusion , or pneumonia .
    OUTPUT:
    
No acute cardiopulmonary process .