Gastrointestinal endoscopy is a medical procedure which is used to see the inside of the digestive tract. It helps in viewing and analyzing ulcers and muscle spasms. It is conducted through a flexible fiber-optic tube with a small TV camera at the end. This tube is connected to an eyepiece or a video screen. Gastointestinal endoscopy is categorized into different types based on the portion of the digestive tract under examination. These types are upper GI endoscopy, colonoscopy and enteroscopy. Upper GI endoscopy is used to examine the esophagus, stomach and the upper small bowel. Colonoscopy is used for examining the intestine, colon and large bowel for ulcers and abnormal growths. This book unfolds the innovative aspects of gastrointestinal endoscopy which will be crucial for the progress of this field in the future. It presents researches and studies performed by experts across the globe. Those with an interest in this field would find this book helpful.