Gastric dilatation observed on radionuclide studies. Spherical approximation and effective wall thickness.
Radionuclide studies often define the gastric contents as a photopenic volume. In many cases, the volume can be described by a spherical approximation, which allows a first approach to calculating the volume and monitoring its change. With the further assumption that the stomach wall is a sphere surrounding the contents, the effective thickness of the gastric wall can be determined. This thickness is approximately 0.4-4 mm.
D013271:Gastric Dilatation / Q000000981:diagnostic imaging*; D005766:Gastrointestinal Contents; D006801:Humans; D011877:Radionuclide Imaging; D013270:Stomach / Q000033:anatomy & histology / Q000000981:diagnostic imaging