Magnetic-controlled Capsule Endoscopy vs. Gastroscopy for Detection of Gastric Diseases

Inclusion Criteria: * Patients presented with gastric symptoms and ready for the first Upper GI endoscopy * Patients with known focal gastric diseases: gastric ulcer, gastric polyps, early gastric cancer, gastric stromal tumors and so on. * Age of 18 years to 70 years Exclusion Criteria: * Patients with impaired bowel movement from ileus or organic digestive diseases * Patients with known large and obstructing tumors of the upper GI tract * Patients after upper GI surgery or abdominal surgery altering GI anatomy * Patients under full anticoagulation * Patient in poor general condition * Patients using equipment that may be affected by radio transmission * Patients using equipment that may be affected by magnetic field * Pregnancy or suspected pregnancy