Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . Streaky opacities in the left lower lung are consistent with mild atelectasis . There may be a small lung nodule at the right second anterior interspace . No focal consolidation , edema , or pneumothorax . The heart is mild - to - moderately enlarged . The mediastinum is not widened . No subdiaphragmatic free air on this upright image . The partially imaged bowel gas pattern is nonspecific . No acute osseous abnormality . Bilateral prior shoulder tendon repairs are again seen .
    OUTPUT:
    
1 . No subdiaphragmatic free air . 2 . Atelectasis . 3 . Mild - to - moderate cardiomegaly . 4 . Possible small right pulmonary nodule at the right second anterior interspace . Recommend conventional chest radiograph to further assess .