Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right upper lobe linear scarring is unchanged . The lungs are otherwise clear with no evidence of previous or active TB . There is no pneumothorax . Minimal dextroscoliosis of the thoracic spine is essentially unchanged .
    OUTPUT:
    
No evidence of previous or active TB . Stable right upper lobe linear scarring with otherwise clear lungs .