Radiofrequency ablation (RFA) therapy has been shown to be safe and effective for treating Barrett's esophagus.  Radiofrequency energy (radio waves) is delivered via a catheter to the esophagus to remove diseased tissue while minimizing injury to healthy esophagus tissue. This is called ablation, which means the removal or destruction of abnormal tissue.

http://www.curebarretts.com/treatment-options/halo-rfa-therapy.php