[Gate-users] output-Edep / output-Dose

[Grevillot Loic]

Hi Mike,

Please post your questions on the list, so that anyone can benefit and participate.


From: Mike Tabriz [mailto:mtabriz at yahoo.com]
Sent: Donnerstag, 6. März 2014 02:10
To: Grevillot Loic
Subject: Re: [Gate-users] output-Edep / output-Dose

Hi Loic,
I did try attaching the dose actor to phantom but still not luck. I was just wondering if you had tried running the macro by any chance and whether I am on the right track. Do you think I would perhaps need to read in the geometry separately for the dose actor to work?

Thank you,
Mike

On Wednesday, March 5, 2014 1:35 AM, Grevillot Loic <loic.grevillot at medaustron.at<mailto:loic.grevillot at medaustron.at>> wrote:
Dear Mike,

Please try to attach the dose actor to “phantom” instead of “world”.

Kind regards,

Loïc Grevillot



From: gate-users-bounces at lists.opengatecollaboration.org<mailto:gate-users-bounces at lists.opengatecollaboration.org> [mailto:gate-users-bounces at lists.opengatecollaboration.org] On Behalf Of Mike Tabriz
Sent: Dienstag, 4. März 2014 16:13
To: gate-users at lists.opengatecollaboration.org<mailto:gate-users at lists.opengatecollaboration.org>
Subject: [Gate-users] output-Edep / output-Dose

Dear Gate users,

I have written several working macros in simulating dose distributions in a 3D voxelized human phantom. Now, I am trying to validate the code by creating a simple geometry which is no more than a sphere filled with water and a radioactive point source at the center.

Everything appears to be fine when I run the code and I get all the output images in hdr/img format, as expected. When I open the output-Edep or output-Dose files using ImageJ, however, I get a large file filled only with zero values in the matrix. In other words, all of matrix characteristics are as assigned in the Actors macro (size, dimensions etc.) but I cannot find any signals (positive values) anywhere. No dose is collected!

My guess is that the code requires the geometry to be read in as an image with .hdr format and that the sphere created by the code itself is not adequate when you use doseActor (?) I would appreciate your opinion in this area and whether you think there is an easier way of designing this simulation without having to create a sphere separately, converting it into Analyze format and then reading it into the code. I am enclosing some of the relevant information with this e-mail. Thank you.



Sincerely,
Mike

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