The accuracy of 99 molybdenum assays in 99m technetium solutions
A study was performed to determine the accuracy of 99Mo measurements using three commercial dose calibrators with their 99Mo assay shields. One 99Mo assay shield allowed excessive penetration by the lower energy 99mTc photons, resulting in the calibrator's falsely high interpretation of the activity of 99Mo present in the high-activity 99mTc eluates. All three calibrators performed adequately with a National Bureau of Standards 99Mo standard in equilibrium with 99mTc. By using low-activity aliquots of 99Mo and 99mTc, a low-level linearity test was performed. Two of the calibrators were found to have a threshold of approximately 10 microCi (370 kBq) for a nonzero 99Mo response, although one of these occasionally produced variable nonzero responses below its threshold. Only one of the calibrators was found to reflect accurately the activity of 99Mo present under all conditions tested.
- OSTI ID:
- 6064634
- Journal Information:
- Radiobiology (Engl. Transl.); (United States), Journal Name: Radiobiology (Engl. Transl.); (United States) Vol. 138:2; ISSN RADBA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
655002* -- Medical Physics-- Radiation Source Calibration & Standardization
ACCURACY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALIBRATION
DAYS LIVING RADIOISOTOPES
DOSES
EVEN-ODD NUCLEI
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MOLYBDENUM 99
MOLYBDENUM ISOTOPES
NATIONAL ORGANIZATIONS
NUCLEI
ODD-EVEN NUCLEI
RADIATION DOSES
RADIOASSAY
RADIOISOTOPES
TECHNETIUM 99
TECHNETIUM ISOTOPES
US DOC
US NBS
US ORGANIZATIONS
YEARS LIVING RADIOISOTOPES