Re(2): Radionuclide impurities in Thera

[JMUCKERHEIDE@delphi.com]

Franz,
 
>Nevertheless I
> asked a friend and she confirmed that in radiopharmaceuticals used for
> diagnosis the presence of certain radionuclides is not tolerated. For
> instance in the use of Tl-201, which is used for myocard investigations the
> nuclide Tl-202 is not welcome. The same is true for I-125 which is used in
> invitro investigations. The impurity of I-124 must not exceed 1/1000 of I-125.
<snip> 

Intriguing that these "contaminants" are "not tolerated".  Do you know why?

> Franz
> Schoenhofer