Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear bilaterally and well expanded with no focal consolidation , pleural effusion , or evidence of pneumothorax . The cardiomediastinal silhouette is stable and within normal limits . The pleural surfaces are unremarkable . Noted are multilevel degenerative changes in the thoracic spine with intervertebral disc calcifications .
    OUTPUT:
    
Normal chest x-ray with no evidence of infection or malignancy .