Dear Minal Y. Nadar,
I transfer your email in Fluka-discuss so that everyone can benefit from your question.
Two points can explain your differences:
1) If your RADDECAY card is in semi-analog mode, each daughter nucleus are treated in Monte-Carlo as particles.
In this case, the result of your dose comes from an equilibrium between Tc-99m and Tc-99.
A solution to get specific dose from Tc-99m would be to simulate dose from Tc-99m and from Tc-99 and to calculate the difference between these doses and get only the one from Tc-99m.
2)The second reason could come from your literature source.
Tc-99m is often produced from decay of Mo-99.
Sometimes, in literature, we can find dose of the mixture Mo-99/Tc-99m at secular equilibrium.
I hope this helps,
Best regards,
Thomas Frosio
-----Original Message-----
From: minalyn_at_barc.gov.in <minalyn_at_barc.gov.in>
Sent: Tuesday, July 31, 2018 11:48 AM
To: Thomas Frosio <thomas.frosio_at_cern.ch>
Subject: Tc-99m isotope source simulation
Dear Thomas,
I have simulated for Tc-99m source in thyroid, spleen, pancreas of voxel phantom, but my values are not matching with literature values. My results are higher by a factor of 10.
I have used RADDECAY card with isotope, HI-Prope card with -1 and DcySCORE cards for usrbin and usrtrack scoring.
My values were matching for I-131 values for various source-target combinations in voxel phantom by < 1 %.
What i am missing?
Regards,
Minal Y. Nadar
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Received on Tue Jul 31 2018 - 15:00:18 CEST