[Gate-users] a question about ct source

Masoud masoud11270 at yahoo.com
Mon Aug 24 11:59:53 CEST 2015

Dear all,In arbitrary point-wise spectrum "Arb" comment for definition of an x-ray spectrum using GATE, the first column is Energy (MeV) and the second one, if we use the number of photons in each energy is for example:
/gate/source/xraygun/gps/histpoint 0.1 50
/gate/source/xraygun/gps/histpoint 0.2 60
/gate/source/xraygun/gps/histpoint 0.3 70
/gate/source/xraygun/gps/histpoint 0.4 80
/gate/source/xraygun/gps/histpoint 0.5 90
/gate/source/xraygun/gps/histpoint 0.6 100
/gate/source/xraygun/gps/histpoint 0.7 90
/gate/source/xraygun/gps/histpoint 0.8 80
/gate/source/xraygun/gps/histpoint 0.9 70
/gate/source/xraygun/gps/histpoint 1.0 60
As you can see the total number of photons in the spectrum is equal 850. So please guide me if I need to set activity in the following comment as 850 Bq? And what about time slice?
/gate/source/x-raygun/setActivity 850 Becquerel/gate/application/setTimeSlice 1. S
If I use the normalized value for the second column, what can I set activity? I have just 850 photons not more! Thank you.
Best Regards,Masoud
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