Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Borderline enlargement of the cardiac silhouette is re - demonstrated with coronary artery stents re - visualized on the lateral view . Aorta remains mildly tortuous . Mediastinal and hilar contours otherwise are unchanged . Pulmonary vasculature is normal in the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Lungs are mildly hyperinflated . 4 mm nodular opacity projecting over the right lung apex is noted , which could be within the lung or osseous structures .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . 4 mm nodular opacity projecting over the right lung apex . It is unclear if this lies within the lung or osseous structures . Further assessment with shallow oblique imaging is recommended .