Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No preoperative comparison is available . Following transbronchial biopsy , there is no evidence of pneumothorax . Areas of patchy opacification are seen bilaterally , possibly relating to chronic changes on the right . In the lingular region , there is some indistinctness of the area of nodule seen on CT , possibly relating to some bleeding related to the procedure .
    OUTPUT:
    
No pneumothorax identified .