Difference of thyroid volume measured by single photon emission computed tomography imaging at different times after Na99TcmO4 injection

Abstract

Objective To investigate the difference of thyroid volume measured by single photon emission computed tomography (SPECT) imaging at different times after Na99TcmO4 injection. Methods A total of 132 patients with hyperthyroidism admitted to Taiyuan Central Hospital from January 2017 to December 2018 were randomly selected. All patients underwent SPECT imaging after Na99TcmO4 injection. The thyroid imaging at different time points was analyzed by tomosynthesis method and plane method. Results There were no statistically significant differences in the thyroid volume between the fault integration method and the planar method at different time points (t=1.889, 1.968, 1.928, 1.720, 1.712, 1.511, 1.893, 1.802; P>0.05). Thyroid imaging at different time intervals was positively correlated with 20-minute tomosynthesis method and plane method (P<0.05). The tomographic imaging score was 3.40 ±1.57, which was higher than that of the plane method (2.01 ± 0.61), P<0.05; and the volumetric CV value of the tomographic integral method was lower than the planar method (t=19.245, P<0.05). Conclusion The difference of thyroid volume measured by SPECT imaging at different time intervals after Na99TcmO4 injection is small, and hyperthyroidism patients can perform SPECT imaging within 1 hour after injection of reagent. Key words: Thyroid; Na99TcmO4; Single photon emission computed tomography imaging