Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates a normal cardiomediastinal silhouette and well - aerated lungs which are clear . There is no focal consolidation , pleural effusion , or pneumothorax . No intra-abdominal free air is appreciated .
    OUTPUT:
    
No intra-abdominal free air identified . Normal chest radiograph .