Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persistent lucency along the anterior mediastinum , best seen on lateral radiograph with absence of lung markings is consistent with artifact due to over penetration . The lungs are well inflated and clear . No pleural effusion . No apical pneumothorax . Extensive aortic arch calcifications are noted . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the osseous structures demonstrates mild multilevel degenerative changes of the thoracolumbar spine as well as levoscoliosis of the lumbar spine centered at L2 - L3 . Again seen are clips in the right upper quadrant of the abdomen .
    OUTPUT:
    
No acute cardiopulmonary process . Specifically no pneumonia .