Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , an opacity seen in the left mid lung zone has improved . There are no new focal consolidations , pleural effusions or pneumothorax . The heart is substantially enlarged , with enlargement of the left atrium . There is substantial tortuosity of the aorta .
    OUTPUT:
    
No radiographic evidence of an acute cardiopulmonary process .