Fig. 5
From: CT-free quantitative SPECT for automatic evaluation of %thyroid uptake based on deep-learning
%thyroid uptake between CT-free SPECT and SPECT/CT as an internal verification test (n = 36 thyroid SPECT/CT). a The correlation is excellent with r = 0.9980, R2 = 0.9959, and p < 0.0001. b The Bland–Altman plot shows no significant systemic deviation with bias =  − 0.09% point. c The %thyroid uptake readily differentiates the thyroid diseases. Data are mean ± standard deviation. The other two cases are drug-induced thyroiditis and lingual thyroid. The error bars for painless/subacute thyroiditis and the others are not obvious because of the limited size compared with the respective symbols. The normal reference range was reported as 0.78 ± 0.5% [21]. SNG, single nodular goiter and NMG, multi-nodular goiter