Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate enlargement of the cardiac silhouette . The aorta is mildly tortuous and calcified . Pulmonary vascularity is not engorged . Ill - defined opacity is noted within the right lung base , which is concerning for an infectious process . There is no large pleural effusion or pneumothorax . Mild degenerative changes are noted in the thoracic spine . Multiple clips are seen within the upper abdomen .
    OUTPUT:
    
Ill - defined opacity within the right lung base which is concerning for pneumonia . Followup radiographs after treatment are recommended to ensure resolution of this finding .