Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . There is nodular opacity in the region of the right middle lobe which is new from prior exam and could represent infectious process or possibly aspiration . No effusion or pneumothorax . The heart and mediastinal contours are stable with borderline cardiomegaly . Bony structures are intact .
    OUTPUT:
    
Nodular opacity in the right middle lobe concerning for infection or aspiration .