Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is background hyperinflation . Heart is not enlarged . Aorta is mildly tortuous . Density at the right hilum superiorly is thought to represent confluence of vascular shadows . No CHF , focal infiltrate , effusion , or pneumothorax is detected . Degenerative changes in the thoracic spine noted .
    OUTPUT:
    
No acute pulmonary process identified .