2016 ACVIM Forum Research Abstract Program

For scintigraphy, 60-second static acquisitions were performed in right and left lateral recumbency at 0, 5, 15, 30, 45, and 60 minutes following a 4 mCi Tc99M-mebrofenin solid test meal (20% of daily energy requirements), and at 30-minute intervals thereafter. Mean total counts from a gastric region of interest were measured from both images. Geometric means of the decay-corrected counts were calculated, and the amount of gastric radioactivity was expressed as a percentage of the initial count. Using nonlinear regression analysis, 25%, 50%, 75% and 90% GE times were determined. Sonographic assessment of GE was repeated three times after the same meal (non-labeled). Using the same time points, mean cross-sectional area of transverse images of the relaxed antrum was obtained and expressed as a percentage of the maximal area. The area under the curve was calculated and 25%, 50%, 75% and 90% GE times determined.