Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a focus of heterogeneous opacity in the right upper lobe , which may represent acute infectious process . The lungs are otherwise clear . There is no pneumothorax or pleural effusion . The hilar and cardiomediastinal contours are normal . The pulmonary vascularity is normal . Postoperative pneumoperitoneum seen on the prior radiograph has resolved .
    OUTPUT:
    
New focus of heterogeneous opacity in the right upper lobe is concerning for pneumonia .