Objectives: In this study, we aimed to evaluate the efficacy of thyroid volume measurement using Tc pertechnetate single-photon emission computed tomography (SPECT) images, acquired by the standardized uptake value (SUV)-shape scheme designed by our expert team.
Methods: A total of 18 consecutive patients with Graves' disease (GD) were subjected to both ultrasonographic and Tc pertechnetate SPECT examinations of thyroid within a five-day interval. The volume of thyroid lobes and isthmus was measured by ultrasonography (US) according to the ellipsoid volume equation.