Comparison of activity measurements in nuclear medicine services in the Czech Republic

Radionuclide calibrator used in nuclear medicine is the radiation detection equipment for measuring radiopharmaceutical activity. This instrument consists of an ionization chamber with an electrometer. This paper examines the variation in the amounts of radioactivity that is associated with dose calibration. The amount of radioactivity in each sample was measured by CMI and compared with values obtained from radionuclide calibrators over a year period. Measurements of serum bottles were within 10 % for ¹⁸F and ⁹⁰Y, 10–15 % for ¹³¹I and ⁵¹Cr, 10–20 % for ^99mTc, 15–20 % for ⁶⁷Ga, 10–25 % for ¹¹¹In, 15–30 % for ²⁰¹Tl and 15–45 % for ¹²³I.