Nuclear medicine gastric emptying study

What is a nuclear medicine gastric emptying study? 

Either liquid or solid-phase gastric emptying studies can be performed. Liquid studies are typically conducted on infants. After the infant receives a mixture of 99m Tc-sulfur colloid with milk or formula at the normal feeding time, imaging is performed and an emptying half-time is calculated. In adults, a solid-phase emptying study usually is performed after an overnight fast and subsequent ingestion of 99m Tc-sulfur colloid–labeled scrambled eggs as part of a standard meal. Anterior and posterior imaging is obtained with either dynamic imaging in 90 minutes or static images at 0, 1, 2, and 4 hours. The percentage of emptying is calculated based on the geometric mean of the anterior and posterior counts. A consensus statement by the Society of Nuclear Medicine has recommended the use of a low-fat, egg-white meal, although this is not necessarily used at every clinic and normal values are institution dependent and will obviously vary with different meal compositions. Using a 285-calorie meal of scrambled eggs, bread, and jam, normal t1/2t1/2 gastric emptying time (time at which 50% of the gastric contents is emptied) is less than 135 minutes.


Sign up to receive the trending updates and tons of Health Tips

Join SeekhealthZ and never miss the latest health information

Scroll to Top