Reprinted from Gastrointestinal Endoscopy, Vol/edition # 65, Benjamin J Vakoc, Milen Shishko, Seok H Hun, Wang- Yuhl Oh, Melissa J Suter, Adrien E Desjardins, John A Evans, Norman S Nishioka, Guillermo J Tearney, Brett E Bouma, “Comprehensive esophageal microscopy by using optical frequency-domain imaging(with video)”, pages 898-905, Copyright 2007, with permission from Elsevier.