Impact of Automatic Polyp Detection System on Adenoma Detection Rate

Inclusion Criteria: * Patients aged between 40-85 years old who have indications for screening, surveillance and diagnostic. * Patients who have signed inform consent form. Exclusion Criteria: * Patients who have undergone colonic resection * Patients with intracranial and/or central nervous system disease, including cerebral infarction and cerebral hemorrhage. * Patients with severe chronic cardiopulmonary and renal disease. * Patients who are unwilling or unable to consent. * Patients who are not suitable for colonoscopy * Patients who received urgent or therapeutic colonoscopy * Patients with pregnancy, inflammatory bowel disease, polyposis of colon, colorectal cancer, or intestinal obstruction * Patients who are taking aspirin, clopidogrel or other anticoagulants * Patients with withdrawal time \< 6 min