Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low , particularly on the right of the right lung and elevation of the right hemidiaphragm . The trachea is central . The cardiomediastinal contour is normal . Calcification of the aortic arch is noted . The heart size is at the upper limit of normal . No frank pulmonary edema , consolidation or pleural effusion seen . No pneumothorax .
    OUTPUT:
    
Borderline cardiomegaly , no acute cardiopulmonary process seen .