[Gate-users] Dose Actor on Volume of Water

[Maikol Salas Ramirez]

Hi Christopher

1- If you define a sphere in the 0,0,0 position the sphere has 1/4 of his
volume in the each of the 4 voxel that are around 0,0,0 maybe this is with
you see a cube. If you move the sphere to 0.5,0.5,0.5 mm, it will be in the
center of the voxel 1,0,0, then you will see this voxel brighter than
others around. This is tricky, am it is a normal error when the people used
NM and CT in the simulation (NM needs a shift).

2- In the dose actor you need at least lo specify the Position, voxelSize
and Resolution (setSize is not necessary). I guess, you are only testing,
because put a sphere with a similar size to the voxel es a bit strange.
Normally for a voxel kernel the people use a box with the same size to tha
voxel.

Best regards
Maikol



El mar., 20 nov. 2018 a las 14:11, Christopher Watanabe (<
chris.r.watanabe at gmail.com>) escribió:

> Hello fellow Gate Users,
>
> I'm running simulations of a radioactive source placed within a volume of
> water. Below I show snippets of showing the volume of water made inside a
> world of air (3cm x 3cm x 3cm) and the dose actor.
> [image: image.png]
> [image: image.png]
> I've played with the dose actor characteristics quite a bit, and I've
> found that no matter what I do, the .mhd dose file output consistently
> shows a Cube shaped dose distribution. This doesn't make sense to me, as
> I've defined a spherical source of radiation and attached the dose actor to
> the sphere of water...Can anyone suggest something that might be going
> wrong? My source I define below:
> [image: image.png]
> Thanks a lot in advnance! I think if there's no problem with my dose actor
> definition, then I must be doing something wrong with my source definition.
>
> Best Regards,
>
> Chris
>
> _______________________________________________
> 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/pipermail/gate-users/attachments/20181120/e19d0e18/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 24513 bytes
Desc: not available
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20181120/e19d0e18/attachment-0003.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 18249 bytes
Desc: not available
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20181120/e19d0e18/attachment-0004.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 11193 bytes
Desc: not available
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20181120/e19d0e18/attachment-0005.png>