Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is within normal limits . Lungs are hyperinflated . The pulmonary arteries are prominent . There is no focal consolidation or pleural effusion . No pulmonary edema . No pneumothorax . Previously noted 3 mm pulmonary nodule is too small to be visible radiographically .
    OUTPUT:
    
Previously seen 3 mm pulmonary nodule is too small to be detected radiographically and should be followed up by CT .