Calibration of the Accuscan II In Vivo System for I-125 Thyroid Counting

Perry, Ovard R. ; Georgeson, David L.

Idaho National Laboratory

关键词: Calibration;    Testing;    Iodine;    Verification Bioassay;    In Vivo;   

DOI  :  10.2172/1042344
RP-ID  :  INL/EXT-11-22663
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1042344

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes the March 2011 calibration of the Accuscan II HpGe In Vivo system for I-125 thyroid counting. The source used for the calibration was a DOE manufactured Am-241/Eu-152 source contained in a 22 ml vial BEA Am-241/Eu-152 RMC II-1 with energies from 26 keV to 344 keV. The center of the detector housing was positioned 64 inches from the vault floor. This position places the approximate center line of the detector housing at the center line of the source in the phantom thyroid tube. The energy and efficiency calibration were performed using an RMC II phantom (Appendix J). Performance testing was conducted using source BEA Am-241/Eu-152 RMC II-1 and Validation testing was performed using an I-125 source in a 30 ml vial (I-125 BEA Thyroid 002) and an ANSI N44.3 phantom (Appendix I). This report includes an overview introduction and records for the energy/FWHM and efficiency calibration including performance verification and validation counting. The Accuscan II system was successfully calibrated for counting the thyroid for I-125 and verified in accordance with ANSI/HPS N13.30-1996 criteria.