Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged with mild unfolding of the thoracic aortic arch . Hilar contours are normal . There is no frank fluid overload . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Mild cardiomegaly without fluid overload . No evidence for pneumonia .