Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are within normal limits . The pulmonary vasculature is not engorged . Hyperlucent and hyperexpanded left upper lobe with hypoplastic vasculature appears unchanged compatible with bronchial atresia . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . No acute osseous abnormality is demonstrated .
    OUTPUT:
    
Unchanged appearance of the left upper lobe compatible with bronchial atresia . No acute cardiopulmonary process otherwise identified .