[Gate-users] Dose actor and uncertainties

[narbor]

Hi Sylvain,
Here is a short summary (in french) about dose uncertainty in GATE that 
I've wrote some times ago (it's a personnal note...so quite basic and 
not very well written).
Hope it helps to answer your questions.
If something is not clear, don't hesitate to send me a mail.
Best regards,
Nicolas Arbor

***********************************************************************
Nicolas ARBOR
Maître de Conférences
Université de Strasbourg - UFR Physique et Ingénierie
Groupe de recherche RaMsEs - Institut Pluridisciplinaire Hubert Curien
23, rue du Loess BP28 67037 Strasbourg Cedex 2
mail : nicolas.arbor at iphc.cnrs.fr / tel : 03.88.10.64.27
***********************************************************************

Le 05/08/2015 13:38, REUZE SYLVAIN a écrit :
>
> Dear Gate users,
>
> I have an issue with dose actor uncertainties. I’ve read several 
> threads on the mailing list about uncertainty calculation, but I don’t 
> understand the output of the dose-uncertainty file.
>
> In my simulation, I have a linac model with an input phase space at 
> the end of the patient-independent part, and I would like to know 
> uncertainty in a region of interest of my dose chart, recorded in a 
> water phantom.
>
> Values of the dose chart very low (~ 10^-8), and values of the 
> uncertainty chart are between 6 and 10. Are these values relative (in 
> %) or absolute ?
>
> And when I try to use dose squared and dose with a formula (Visvikis 
> et al.: https://hal.archives-ouvertes.fr/in2p3-00025095/document), I 
> have negative values under the square root.
>
> Could you help me ?
>
> Best regards,
>
> *Sylvain Reuzé *
>
> Intern in medical physics
>
> GUSTAVE ROUSSY
>
> Radiotherapy - Medical Physics Department
>
> Tél. : (+0033) 1 42 11 54 06
>
> www.gustaveroussy.fr <http://www.gustaveroussy.fr/>
>
>
>
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20150805/712bcf48/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 6696 bytes
Desc: not available
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20150805/712bcf48/attachment-0001.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: StatDose.pdf
Type: video/x-flv
Size: 112123 bytes
Desc: not available
URL: <http://lists.opengatecollaboration.org/mailman/private/gate-users/attachments/20150805/712bcf48/attachment-0001.flv>