<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:14px"><div class="" style=""><span class="" style="">Dear experienced GATE users,</span></div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class=""><span class="" style=""><br class="" style=""></span></div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class=""><span class="" style="">I have generated an x-ray spectra by using Spektr program (Siewerdsen, Boone and Siebert) for an x-ray tube potential of 120 kV at a constant 1 mAs and a total filtration of 11.8 mm Al. I, would like to use the generated
x-ray spectra as GPS point source with user-defined</span> energy histogram or arbitrary point-wise spectrum (whatever suitable) in CT simulation with GATE.</div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class=""> </div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class="">Here I have tried one using user-defined energy histogram for use GATE Simulation of CT. But I am not sure. So, please have a look at the file attached and correct me if I am wrong. The first column of the histogram is the energy bin in MeV in the x-ray spectra and the 2nd column is the photon fluence (photons per sq mm) in the x-ray spectra as weight of the
histogram. </div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class=""><br></div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class="">Any suggestion/modification/comments on the above matter will be highly appreciated.</div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class=""><br class="" style=""></div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;"
class="">Thanking you in advance.</div><div style="color: rgb(0, 0, 0); font-size: 14px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;" class=""><br class="" style=""></div><div class="" style="">Regards,<br class="" style="">S. Megha Singh</div><div class="" style=""><br class="" style=""></div><div class="" style=""><div class="" style=""><br class="" style=""></div></div></div></body></html>