Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is marked tortuosity of the thoracic aorta and large right and left pulmonary arteries , which exaggerates the mediastinum size . Heart size is at the upper limits of normal No chf , focal infiltrate , or effusion is detected . There is no pneumothorax . 6 .7 mm nodular density seen in the right midzone , between rhe ___ and ___ anteiror ribs , likely represents artifact due to a nipple shadow , as there is no correlate on the ___ chest CT . Surgical clips noted in the upper abdomen . No free air identified beneath the diaphragms .
    OUTPUT:
    
No evidence of acute pulmonary process .