(Mis)use of 133 Ba as a calibration surrogate for 131 I in clinical activity calibrators
| Autor: | Brian E. Zimmerman, Denis E. Bergeron |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Radiation
Radiation Dosimeters Chemistry Analytical chemistry Reproducibility of Results Equipment Design Sensitivity and Specificity United States Article Ampoule 030218 nuclear medicine & medical imaging Equipment Failure Analysis Iodine Radioisotopes 03 medical and health sciences 0302 clinical medicine 030220 oncology & carcinogenesis Calibration Ionization chamber Barium Radioisotopes NIST |
| Zdroj: | Applied Radiation and Isotopes. 109:250-253 |
| ISSN: | 0969-8043 |
| Popis: | Using NIST-calibrated solutions of (131)Ba and (131)I in the 5mL NIST ampoule geometry, measurements were made in three NIST-maintained Capintec activity calibrators and the NIST Vinten 671 ionization chamber to evaluate the suitability of using (133)Ba as a calibration surrogate for (131)I. For the Capintec calibrators, the (133)Ba response was a factor of about 300% higher than that of the same amount of (131)I. For the Vinten 671, the Ba-133 response was about 7% higher than that of (131)I. These results demonstrate that (133)Ba is a poor surrogate for (131)I. New calibration factors for these radionuclides in the ampoule geometry for the Vinten 671 and Capintec activity calibrators were also determined. |
| Databáze: | OpenAIRE |
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