Fig. 3

a Relationship between EANM-based absorbed dose (D_EANM) and image-based absorbed dose (\( {\overline{D}}_{\mathrm{image}} \)) without PVC, using the regression equation: \( {\overline{D}}_{\mathrm{image}} \) = 0.47 × D_EANM + 24.89 (95% CIs of slope and y-intercept = 0.37–2.19 and 0.56–47.59, respectively). b The Bland-Altman analysis was performed between D_EANM and \( {\overline{D}}_{\mathrm{image}} \). There were fixed bias (− 97.7 Gy [95% CI = − 107.9 to − 87.4]) and proportional bias (Pearson’s correlation coefficient = − 0.72 [95% CI = − 0.84 to − 0.55]). Note that each symbol in the figure represents three therapeutic outcomes: open circle, hypothyroidism; open triangle, euthyroidism; and cross, hyperthyroidism