Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lower lobe lesion was treated recently with RFA . Small residual pneumothorax is unchanged , measuring at most 11 mm . A pigtail still projects in the lower anterior hemithorax . Multiple calcified pleural plaques are due to previous asbestos exposure . Sternotomy was done for CABG in this patient with moderate cardiomegaly and a pacemaker with a lead in the right ventricle . There is no pleural effusion .
    OUTPUT:
    
Unchanged small right pneumothorax after RFA treatment of a right lower lobe lesion .