[Gate-users] Pixelated SPECT problem

[Simon Stute]

Hi,

The projection output is mainly designed to work on a monolithic crystal
(without a concrete definition of geometric pixels) as you can define the
number of pixels inside the projection output.
The behaviour of the projection output when you are actually using pixels
defined in the system is quite unknown to my knowledge.
Maybe an expert in SPECT simulations could give you a more complete answer.

Cheers,
Simon



On Wed, Oct 14, 2015 at 4:43 AM, Chao Guo <chaoguomedicalphysics at gmail.com>
wrote:

> Dear all,
>
>
>
> I’m trying to use the Pixel level under SPECT to do the pixelated crystal
> and I met some problems. I use the crystal level and it work perfect and
> then I add the pixel level, the projection image shows me something at the
> center of the image but the actual setup is not at center. Does anyone have
> any idea about this?
>
>
>
> I use the example code from the optical imaging benchmark macro:
>
>
>
> /gate/pixel/geometry/setXLength                 2.0  cm
>
> /gate/pixel/geometry/setYLength                 2.0  cm
>
> /gate/pixel/geometry/setZLength                 1.0 cm
>
> /gate/pixel/setMaterial                         Air
>
> /gate/pixel/placement/setTranslation            0 0 0 cm
>
> /gate/pixel/vis/setColor                        red
>
> /gate/pixel/repeaters/insert                    cubicArray
>
> /gate/pixel/cubicArray/setRepeatNumberX         5
>
> /gate/pixel/cubicArray/setRepeatNumberY         5
>
> /gate/pixel/cubicArray/setRepeatNumberZ         1
>
> /gate/pixel/cubicArray/setRepeatVector          2.1 2.1 0 cm
>
> /gate/pixel/vis/forceSolid
>
> /gate/pixel/attachCrystalSD
>
> /gate/systems/OpticalSystem/pixel/attach        pixel
>
>
>
> Please let me know if you guys have any suggestions, thank you
>
>
>
> Chao
>
>
>
>
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