Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperinflated . The cardiomediastinal silhouette is stable . No CHF , focal infiltrate or effusion is identified . At the right lung apex , there is a tiny ( 3 .1 mm ) nodular opacity projecting over right lung apex . No pneumothorax .
    OUTPUT:
    
Background COPD . No acute pulmonary process identified . In particular , no pulmonary infiltrate detected . A small ( 3 .1 ) nodular opacity overlying the right lung apex not visualized on the previous chest x-ray further assessment with a non emergent chest CT is recommended .