Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are hyperinflated . There is unchanged opacity at the right upper lobe , unchanged since at least ___ . The cardiomediastinal silhouette and hilar contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Hyperinflated lungs without pulmonary edema or consolidation . 2 . Persistent irregularly marginated linear opacity in the right upper lobe , stable since at least ___ . Although possibly due to nodular scarring , indolent infection , or a slow growing lung adenocarcinoma may present with a similar radiographic appearance . If clinically indicated , a chest CT may be obtained for further evaluation .