TY - JOUR
T1 - On the "artificial" nature of Tc and the "carrier-free" nature of 99mTc from 99Mo/99mTc generators
AU - Alfassi, Zeev B.
AU - Groppi, Flavia
AU - Bonardi, Mauro L.
AU - De Goeij, Jeroen J.M.
PY - 2005/1/1
Y1 - 2005/1/1
N2 - Two widespread misconceptions regarding Tc are dealt with. First, it is shown that although primordial Tc has decayed completely, Tc is still present in nature due to natural processes, in addition to substantial man-made quantities. Thus, Tc cannot be considered as a purely artificial element. Second, it is shown that 99mTc from 99Mo/99mTc generators is certainly not carrier-free (CF) and that, "no-carrier- added" (NCA) is a more appropriate designation. As a quantitative measure of the amount of long-lived 99gTc carrier present in 99mTc preparations from generators, the Isotope Dilution Factor (IDF) is used and calculated for some practical situations.
AB - Two widespread misconceptions regarding Tc are dealt with. First, it is shown that although primordial Tc has decayed completely, Tc is still present in nature due to natural processes, in addition to substantial man-made quantities. Thus, Tc cannot be considered as a purely artificial element. Second, it is shown that 99mTc from 99Mo/99mTc generators is certainly not carrier-free (CF) and that, "no-carrier- added" (NCA) is a more appropriate designation. As a quantitative measure of the amount of long-lived 99gTc carrier present in 99mTc preparations from generators, the Isotope Dilution Factor (IDF) is used and calculated for some practical situations.
KW - Artificial element
KW - Isotope dilution factor
KW - No-carrier-added
KW - TcTc
UR - http://www.scopus.com/inward/record.url?scp=18144394678&partnerID=8YFLogxK
U2 - 10.1016/j.apradiso.2005.01.009
DO - 10.1016/j.apradiso.2005.01.009
M3 - Article
AN - SCOPUS:18144394678
SN - 0969-8043
VL - 63
SP - 37
EP - 40
JO - Applied Radiation and Isotopes
JF - Applied Radiation and Isotopes
IS - 1
ER -