Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , there is no significant change . Lungs are fully expanded and clear . There is no focal consolidation , effusion or pneumothorax . Mediastinal and hilar contours are normal . Heart size is normal .
    OUTPUT:
    
No acute intrathoracic process . Specifically , no evidence of active pulmonary tuberculosis .