Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top - normal . There is mild unfolding of the thoracic aorta . Mild calcifications are noted in the aortic knob . There is central pulmonary vascular congestion without frank interstitial edema . Lungs are otherwise clear . No pleural effusion pneumothorax .
    OUTPUT:
    
Central pulmonary vascular congestion without frank interstitial edema . No evidence of pneumonia .