SPECTROMETRIC MEASUREMENTS OF 131 I AND 99m Tc ACTIVITY IN THYROID

I in order to take into account the depth of the thyroid in human neck [1]. It was shown earlier [2,3] that the cases of non-typical distribution of the iodine in the patient's neck could be detected by spectrometric meas-urements of the whole spectrum of the radiation emitted from the thyroid. Another goal of this work was to improve the accu-racy of the method by the use of HPGe counter instead of the NaI(Tl) scintillation detector and the changing the patient’s position from sitting to lying. The proposed calibration method was also studied for technetium