Inclusion Criteria:  Patients aged over 18 years presenting to the Department of Gastroenterology & Hepatology at the Princess Alexandra Hospital who require and are booked for an upper gastrointestinal endoscopy as part of the routine diagnostic work up of e.g. otherwise unexplained gastrointestinal symptoms.  Exclusion Criteria:  Radiation Enteritis Pregnancy Gastric bezoar Swallowing disorders/dysphagia to food or pills Obese, with BMI over 35 Suspected or known strictures of the GI tract Fistulas or physiological/mechanical GI obstruction GI surgery within the past 3 months Diverticultis Patients with implantable or portable electro-mechanical medical devices, e.g. pacemakers