Abstract Background In clinical practice. the organs at risk (OARs) should be carefully determined when performing pancreatic stereotactic body radiotherapy (SBRT). We conducted a simulation study to examine the effect of the stomach size on the radiation dose to the OARs when performing pancreatic SBRT. Methods Twenty-five cases were included in this study. https://halohealthcarers.shop/product-category/one-piece-ostomy-pouch/