Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate well - expanded lungs . Cardiomediastinal contour is within normal limits . Vague rounded opacity overlying the right first rib and clavicle is potentially external . Lungs are otherwise clear without focal areas of consolidation . There is no pleural effusion and no pneumothorax .
    OUTPUT:
    
1 . Vague rounded opacity overlying the right first rib and clavicle is potentially external for which correlation with exam is suggested . If nothing found , repeat frontal and apical lordotic views are recommended . 2 . No definite acute cardiopulmonary abnormality .