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Fig. 3 | European Journal of Hybrid Imaging

Fig. 3

From: Quantitative Iodine-123 single-photon emission computed tomography/computed tomography for Iodine-131 therapy of an autonomously functioning thyroid nodule

Fig. 3

Pre-therapeutic planning for I-131 activity. The target concentration of I-131 was plotted against I-131 activity for the AFTN and the contralateral normal thyroid tissue. The therapeutic windows for the AFTN and normal thyroid tissues are noted when 15 mCi (thin vertical double arrow) and 30 mCi (thick vertical double arrow) are applied. SNG refers to sporadic nontoxic nodular goiter, which was treated with an I-131 concentration of 120 µCi/g (3). LTMG stands for large toxic multi-nodular goiter, which was successfully treated with a target I-131 concentration of 200 µCi/g (14). AFTN autonomously functioning thyroid nodule

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