Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The lungs are well expanded and clear . There is no evidence of focal consolidation , pleural effusion or pulmonary edema . The cardiomediastinal silhouette is unremarkable , accounting for mild pectus excavatum deformity . There is a 2 - mm round metallic radiopacity external to the patient overlying the right sternoclavicular joint .
    OUTPUT:
    
No acute cardiopulmonary disease .