Most clinical measurements of radioactivity, whether for therapeutic or imaging nuclides, rely on commercial reentrant ionization chambers (dose calibrators). The National Institute of Standards and Technology (NIST) maintains a battery of representative calibrators and works to link calibration settings (dial settings) to primary radioactivity standards. Here, we provide a summary of NIST-determined dial settings for 22 radionuclides, including several previously unreported settings. In general, current manufacturer-provided calibration settings give activities that agree with NIST standards to within a few percent.
Nuclear Medicine Communications
radionuclide calibrator, activimeter, dial setting, nuclear medicine, quantitative imaging