Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographdemonstrates moderately well expanded and clear lungs . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . A radiopacity is seen projecting over the mid hemithorax on lateral view only and is likely external to the patient . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
1 . No radiographic findings to account for cough .