Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is essentially unchanged from prior study . The lungs are well inflated and clear bilaterally . There are no masses , lesions , pleural effusion or pneumothorax . The cardiomediastinal silhouette is stable and within normal limits . The pleural surfaces are unremarkable .
    OUTPUT:
    
No evidence of lesions or nodules . Lungs are clear bilaterally .