Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal . No focal consolidation , effusion or pneumothorax . There is no central vascular congestion or overt pulmonary edema . Mild apparent thickening of the right paratracheal stripe could represent a prominent SVC and partly be explained by an unfolded thoracic aorta , though mediastinal lymphadenopathy can not be definitively excluded . Heart is borderline in size .
    OUTPUT:
    
1 . Mild apparent thickening of the right paratracheal stripe could represent a prominent SVC / vasculature , though mediastinal lymphadenopathy can not be definitively excluded on the basis of this examination . If there is persistent clinical concern , a chest CT could be performed for further evaluation . 2 . Borderline heart size .