Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The heart is stably enlarged with tortuous aortic contour . Hilar and mediastinal contours are stable with stable mild prominence of the pulmonary arteries . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic process . Stable cardiomegaly .