[Gate-users] Voxelized Phantom and FixedForcedDetection actor

[Triltsch, Nicolas]

Hi Simon,

I found out what the problem was: The voxelized phantom was too big and 
even cut the detector. I exported a numpy array with a pixelsize of 100 
micrometer, but in the .mhd file it was per default set to 1mm, so I had 
to change that manually afterwards.

Thanks anyway!

Nico

On 11/25/2016 11:30 AM, Simon Rit wrote:
> Hi,
> No, it doesn't since you have a detector response from 0 to 1 Mev. Are
> you sure it's 150 keV and not 150 MeV? If yes, don't hesitate to share
> the macro and I'll have a look.
> Simon
>
> On Fri, Nov 25, 2016 at 9:54 AM, Triltsch, Nicolas
> <nicolas.triltsch at tum.de> wrote:
>> Hi Simon,
>>
>> That is correct, I changed the spectrum (0-150keV) and the detector response
>> (first line 0 1, second line 1 1) to a photon counting system. Does that
>> explain something?
>>
>> Nico
>>
>>
>>
>> On 11/24/2016 06:10 PM, Simon Rit wrote:
>>> Hi,
>>> Did you modify the detector response or the spectrum of the example?
>>> It seems that you have photons detected at an energy lower or larger
>>> than the minimum or maximum of your detector response function.
>>> Simon
>>>
>>> On Thu, Nov 24, 2016 at 6:06 PM, Triltsch, Nicolas
>>> <nicolas.triltsch at tum.de> wrote:
>>>> Hey everyone,
>>>>
>>>> I tried to use my own voxelized phantom (dimension 384x32x384) together
>>>> with
>>>> the FixedForcedDetection actor (detector dimension 384x12) and my macros
>>>> are
>>>> similar build as in the example-folder
>>>> example_CT/fixedForcedDetectionCT/mac/. For the creation of the voxelized
>>>> phantom I first created the desired numpy array and exported it with
>>>> SimpleITK using the sitk.WriteImage(img, 'path/name.mhd') command.
>>>>
>>>> When I run the simulation now, I get the following errors:
>>>>
>>>> Photon Energy outside the Response Detector list
>>>> WARNING - Attempt to delete the physical volume store while geometry
>>>> closed
>>>> !
>>>>
>>>> *** Break *** segmentation violation
>>>> *** Error in `Gate': corrupted double-linked list: 0x0000000003618370 ***
>>>>
>>>> What could be wrong?
>>>>
>>>> Thanks for any help,
>>>>
>>>> Nico
>>>>
>>>>
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>>