Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears mildly enlarged . The mediastinal and hilar contours are unremarkable . No pulmonary edema is noted . Focal opacity in the right lung bases concerning for aspiration or pneumonia . No pneumothorax or large pleural effusion is present . Degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Right lower lobe opacity concerning for pneumonia or aspiration .