Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle increased opacity in the right infrahilar region on the frontal view could reflect aspiration or early pneumonia . The left lung is clear . Subtle opacity is in the right upper lobe on the prior radiograph were characterized on prior CT . No obvious new pulmonary nodules which are better assessed on CT . No edema , pleural effusion or pneumothorax . The heart is top - normal in size , unchanged . The thoracic aorta is slightly tortuous , unchanged . Slight prominence of the pulmonary artery is unchanged and better characterized on prior CT . Mild dextroconvex scoliosis of the thoracic spine is unchanged . Degenerative changes in the thoracic spine are also similar .
    OUTPUT:
    
Subtle increased right infrahilar opacity could reflect aspiration and / or early pneumonia in the appropriate clinical situation .