 Dyspeptic symptoms such as abdominal pain, bloating and nausea after a meal are common; however the cause of these problems in many patients is often unclear despite medical investigation. This is because dyspeptic symptoms are only rarely related to acid reflux, stomach ulcers or cancer that can be diagnosed by endoscopy. Rather, the cause is abnormal stomach function, so-called functional dyspepsia, a condition in which the digestive system does not function normally after a meal. Gastric scintigraphy is the standard investigation of stomach function in patients with this condition. It involves eating a small test meal that includes a tiny dose of radioactive material so that the movement of food can be visualised as it empties from the stomach. An important limitation of this approach is that symptoms are rarely caused and delayed emptying after a small meal is present only in a minority of patients and, thus, the ability of this investigation to explain the cause of symptoms or guide medical treatment is limited. 