The technique involves the use of a distal black rubber hood (OE-A58) at the tip of the scope (EG-2990Zi) to fix the distance between the tip of the endoscope and the gastric mucosa at 2mm. First the OE system™ will be used (mode 1 and 2), then the optical magnification will be implemented through the actions of a button on the Magniview scope. After reaching the maximum magnification level, the cup will contact to the gastric mucosa and water will be instilled.