The type of food volume and caloric content significantly affect the rate of gastric emptying. The results from my gastric emptying study shows 1-hour retention of 62 percent which is below the normal threshold of 90 percent 2-hour retention of 24 percent below the normal threshold of 60 percent and 3-hour retention of 4 percent also below the normal threshold of 30 percent. Advances In The Diagnosis And Classification Of Gastric And Intestinal Motility Disorders Nature Reviews Gastroenterology Hepatology Gastric emptying scintigraphy has long been the standard method for measuring gastric motility. Interpreting gastric emptying study results . ANALYSIS OF GASTRIC EMPTYING DATA 1307 5. So a normal gastric emptying test will come back with between 30-90 retention after 1 hour after 2 hours normal is less than 60 and after the full 4 hours it should be less than 10. Gastric Emptying Study Results A radiologist will interpret the images write a report and deliver the results to your d...