Standardization of I-131 using portable $4\pi\beta(LS)\mbox{-}\gamma$ coincidence detection system in OPBG hospital.

Pepe F., Corbo M., De Felice P., Bellini V., Abubaker F., Capogni M., Capone M., Cannata V., Donatiello S., Tortorici F., Sutera C.
  Venerdì 16/09   09:00 - 13:30   Aula E - Rosalind Franklin   V - Biofisica e fisica medica   Presentazione
This project concerned the development at ENEA-INMRI of new $in situ 4\pi\beta(LS)\mbox{-}\gamma$ coincidence detection system (4PBLSG) for activity measurement of the short half-life radionuclides used in nuclear medicine. For the first time the portable 4PBLSG detector is used directly at the OPBG hospital in Vatican City, Italy, to measure the activity of I-131 and to calibrate the OPBG ionization chamber used for routine applications. The hardware of the new portable 4PBLSG detector was developed at ENEA-INMRI, in collaboration with Catania University and INFN, by implementing a gamma channel on the existing TDCR portable detector available at ENEA. A data analysis software was updated at CAEN in order to analyze the data recorded in list-mode by the new detector equipped with the CAEN desktop digitizer DT5720. The activity measurements for short half-life radionuclides used in nuclear medicine can be then computed. Two primary activity measurement ---TDCR and $4\pi\beta(LS)\mbox{-}\gamma$ coincidence--- methods were then used to determine the activity of I-131 in the OPBG hospital. The TDCR parameter is measured for I-131 standard solution using both CAEN and ENEA data analysis software.