Gastric emptying studies were performed on 10 healthy volunteers and 20duodenal ulcer （DU）

14 gastric ulcer（GU）and 4 non-ulcer dyspepsia （NUD） patients utilizing a radionuclide technique to assess emptying rate of solid meal （99mTc-phytate collide labelled chicken liver）.For normal subjects the average gastric half-emptying time was 53.8 ± 13.2min. 6 DU patients （6/20） has significantly faster gastric half-emptying time （23.3±3.6min） and other DU patients（7/20） had slower gastric half-emptying time （>90min） than normals.In addition

2 GU patients had fast （<30min） and 4 GU patients had slow gastric half-emptying time （>90min）.These results suggested that gastric emptying time may be useful for monitoring the thrapeutic effect.