Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates hyperinflation of the lungs with no evidence of pneumothorax . The previously seen median sternotomy wires and mitral valve replacement are in unchanged positions compared to the prior study . There is no evidence of pleural effusion or pulmonary edema . The cardiomediastinal silhouette is unchanged compared to the prior study .
    OUTPUT:
    
No evidence of pneumothorax . Essentially unchanged since the prior study . The above findings were communicated to Dr . ___ by Dr . ___ ___ page at 16 :45 , 10 minutes after the discovery was made .