Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no evidence of focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits . No acute displaced fracture is identified . Severe degenerative changes of the thoracic spine noted .
    OUTPUT:
    
No acute cardiopulmonary process identified . There is severe osteopenia which somewhat limits optimal evaluation for subtle fractures . No displaced fractures identified .