Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well inflated and clear bilaterally . There is no pulmonary congestion , focal consolidation , pleural effusion , or evidence of pneumothorax . The cardiomediastinal silhouette is normal in appearance . The pleural surfaces are unremarkable . Skeletal structures are within normal limits except for multilevel degenerative changes seen along the thoracic spine .
    OUTPUT:
    
No evidence of infection or malignancy .