Mo-99/Tc-99m Generator Shortage: Free, Web-Based Software

The article describes a free, Web-based software for calculating the theoretical/estimated 99Mo/99mTc generator yield precisely, taking elution efficiency into account. Such a system should enable the yield of multiple elutions of the generator on the same day as the first elution to be calculated, using the Apache Web server (www.apache.org) and PHP (www.php.net). After inputting the link (www.rad.unipd.it/nucmed/decay/), the user is prompted to complete a form that is currently provided in American/English and Italian. The system is simple to use and requires only 5–6 values, which are: generator calibration date; generator arrival date; 99Mo (in GBq) calibration activity declared by manufacturer; number of hours after first elution when second elution is to be performed (and, if a third elution is needed, the number of hours after the second elution when the third elution is to be performed); and elution efficiency (0.9 is the predefined value).