Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is moderately enlarged . The aortic arch is calcified . Again noted is mild prominence of the main pulmonary artery contour in the aortopulmonary window . There is no pleural effusion or pneumothorax . There is persistent minor atelectasis at the left lung base , but otherwise , the lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .