Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The cardiomediastinal silhouette is within normal limits . Posterior spinal fixation hardware is identified . Abnormal contour of the humeral heads is compatible with patient 's history of a spondyloepiphyseal dysplasia . No free air seen below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process , no free air .