Dear Editor We read with great interest the recently published paper of Szumowski and colleagues [1]. We also evaluated the relationship between Tc-pertechnetate thyroid uptake (TcTU) and 24-h radioiodine thyroid… Click to show full abstract
Dear Editor We read with great interest the recently published paper of Szumowski and colleagues [1]. We also evaluated the relationship between Tc-pertechnetate thyroid uptake (TcTU) and 24-h radioiodine thyroid uptake (RAIU) at 24 hours (RAIU-24) in a series of 76 Graves' Disease (GD) patients with highly concordant results. In facts, we found a strong relationship between RAIU-24 and TcTU values (p < 0.0001); then given a TcTU value, the corresponding RAIU-24 values were estimated by applying the logarithmic function RAIU-24= 15.895ln(TcTU)+ 62.22. Then, such patients were treated with radioiodine and followed up in our centre for at least 1 year after radioiodine treatment. According to the European council directive 97/43/euratom the individual therapeutic activity was calculated according to the formula [2]:
               
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