PT  - JOURNAL ARTICLE
AU  - Ackerhalt, Robert E.
AU  - Sondel, James A.
TI  - Determination of Radionuclide Impurities in Tc-99m: A Rapid Pulse Height Analysis Technique
DP  - 1979 Jun 01
TA  - Journal of Nuclear Medicine Technology
PG  - 84--87
VI  - 7
IP  - 2
4099  - http://tech.snmjournals.org/content/7/2/84.short
4100  - http://tech.snmjournals.org/content/7/2/84.full
SO  - J. Nucl. Med. Technol.1979 Jun 01; 7
AB  - We have developed a simple and rapid procedure for determining levels of multiple radionuclide impurities in Tc-99m generator eluates before use in patients. The technique combines the use of a low gamma energy filter comprised of layers of lead, cadmium, and copper to reduce the radiation from Tc-99m—with pulse height analysis of the transmitted high energy photons from common impurities such as Ru-103, I-131, and Mo-99. The procedure, which employs a multichannel analyzer and subsequent calculations, can be performed in almost the same time required for the current technique using isotope calibrators.