[Gate-users] Significant diferences between dose calculation by Edep and Dose algorithms

[Alex Vergara Gil]

Dear David

Your assumption is correct, I does not obtain dose  = edep/mass and
that's what I trying to show, in the same run I have obtained those
two images (dose and processed edep/mass) and results are
significantly different, not only for dose levels but also for dose
distribution.
As I explain the Edep/mass gives coherent results and thats what I
expect but the dose is completely annoying to me. I must remark that
these are the results of the same run.

I can work now with the edep/mass but I think I found a bug in gate
for dose calculation, if or not the case I would be happy to decipher
the mistery.

Regards
Alex Vergara
Medical Physicist

2015-01-09 1:36 GMT-05:00, David Sarrut <David.Sarrut at creatis.insa-lyon.fr>:
> Hello,
>
> not sure to understand, dose is of course different of edep, because dose
>  = edep/mass
>
> this is not what you obtained ?
>
> David
>
> On Mon, Jan 5, 2015 at 2:25 PM, Alex Vergara Gil <alexvergaragil at gmail.com>
> wrote:
>
>> Hi all!
>>
>> I have ran a patient specific SPECT-CT Study with gate and I found a
>> very significant differences between the dose calculated by deposited
>> energy algorithm (enableEdep    true) and Dose algorithm
>> (enableDose     true). The one with deposited energy is coherent with my
>> previous calculations using Convolution algorithms, anyone can explain
>> what is happening here? I attached two pictures and the same profile
>> in both of them.
>>
>> Regards
>>
>> Alex Vergara
>> Medical Physicist
>>
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>
>
>
> --
> David Sarrut, Phd
> Directeur de recherche CNRS
> CREATIS, UMR CNRS 5220, Inserm U 1044
> Centre de lutte contre le cancer Léon Bérard
> 28 rue Laënnec, 69373 Lyon cedex 08
> Tel : 04 78 78 51 51 / 06 74 72 05 42
> http://www.creatis.insa-lyon.fr/~dsarrut
> _________________________________
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