[Gate-users] [Gate-devel] problem with parametrised collimator setup ...

[Alex Vergara Gil]

Dear Uwe

I have tried your example with the last update on Gate's git branch
develop and I can reproduce your bug

GATE object:        'systems/SPECThead'
Components:

GATE object:        'systems/SPECThead/base'
Attached to volume: SPECThead
Nb of children:       1

        GATE object:        'systems/SPECThead/crystal'
        Attached to volume: crystal
        Nb of children:       1

                GATE object:        'systems/SPECThead/pixel'
                Attached to volume: ---
[Physic-0] The following Geant4's physic-list is enabled :emstandard
[Core-0] Initialization of geometry
GateVVolume.cc (l.189): The material of the volume hole is not defined.
                Nb of children:       0
tems/SPECThead/pixel'
                Attached to volume: ---

It seems something related to the SPECThead system since it is declared in

alex at alex-kubuntu:~/Gate/Correr/fanbeam
collimator/FanBeam_Gamma_Camera/FanBeam_Gamma_Camera$ grep -r 'hole'
colli_parallelbeam.mac:#specify the hole radius
colli_parallelbeam.mac:#distance between the holes
camera_FB.mac:#set the septal thickness to the required distance
between the holes
camera_FB.mac:#specify the hole radius
camera_PB.mac:#specify the hole radius
camera_PB.mac:#distance between the holes
colli_fanbeam.mac:#set the septal thickness to the required distance
between the holes
colli_fanbeam.mac:#specify the hole radius
camera_FB_save.mac:#set the septal thickness to the required distance
between the holes
camera_FB_save.mac:#specify the hole radius
camera_FB_save.mac:#set the septal thickness to the required distance
between the holes
camera_FB_save.mac:#specify the hole radius
camera_Tc.mac:# Insert the first hole of air in the collimator
camera_Tc.mac:/gate/collimator/daughters/name                           hole
camera_Tc.mac:/gate/hole/geometry/setHeight
         3. cm
camera_Tc.mac:/gate/hole/geometry/setRadius
         .15 cm
camera_Tc.mac:/gate/hole/placement/setRotationAxis                      0 1 0
camera_Tc.mac:/gate/hole/placement/setRotationAngle                     90 deg
camera_Tc.mac:/gate/hole/setMaterial
                 Air
camera_Tc.mac:# Repeat the hole in an array
camera_Tc.mac:/gate/hole/repeaters/insert
         cubicArray
camera_Tc.mac:/gate/hole/cubicArray/setRepeatNumberX                    1
camera_Tc.mac:/gate/hole/cubicArray/setRepeatNumberY                    52
camera_Tc.mac:/gate/hole/cubicArray/setRepeatNumberZ                    44
camera_Tc.mac:/gate/hole/cubicArray/setRepeatVector
 0. 0.36  0.624 cm
camera_Tc.mac:# Repeat these holes in a linear
camera_Tc.mac:/gate/hole/repeaters/insert
         linear
camera_Tc.mac:/gate/hole/linear/setRepeatNumber
         2
camera_Tc.mac:/gate/hole/linear/setRepeatVector
         0. 0.18 0.312 cm
camera_I_131.mac:# Insert the first hole of air in the collimator
camera_I_131.mac:/gate/collimator/daughters/name
         hole
camera_I_131.mac:/gate/hole/geometry/setHeight
         5. cm
camera_I_131.mac:/gate/hole/geometry/setRadius
         .15 cm
camera_I_131.mac:/gate/hole/placement/setRotationAxis                   0 1 0
camera_I_131.mac:/gate/hole/placement/setRotationAngle                  90 deg
camera_I_131.mac:/gate/hole/setMaterial
                         Air
camera_I_131.mac:# Repeat the hole in an array
camera_I_131.mac:/gate/hole/repeaters/insert
         cubicArray
camera_I_131.mac:/gate/hole/cubicArray/setRepeatNumberX
         1
camera_I_131.mac:/gate/hole/cubicArray/setRepeatNumberY
         52
camera_I_131.mac:/gate/hole/cubicArray/setRepeatNumberZ
         44
camera_I_131.mac:/gate/hole/cubicArray/setRepeatVector
 0. 0.36  0.624 cm
camera_I_131.mac:# Repeat these holes in a linear
camera_I_131.mac:/gate/hole/repeaters/insert
         linear
camera_I_131.mac:/gate/hole/linear/setRepeatNumber
         2
camera_I_131.mac:/gate/hole/linear/setRepeatVector
         0. 0.18 0.312 cm

I will take a look to this, but if someone has any hints it would be
of great help

Regards
Alex


2015-07-07 8:44 GMT-04:00, Pietrzyk, Uwe <u.pietrzyk at fz-juelich.de>:
>
> Hello Gate-Users,
>
> at least since the GATE version 6.2 there is the option of a parametrised
> collimator setup,
> which allows to define the collimator fan beam and parallel beam
> geometries.
> I wanted to compare both collimations to eventually include them as a new
> example
> within the EduGATE-project.
> However, I experience a strange problem:
>
> fan beam:
> GateVVolume.cc<http://GateVVolume.cc> (l.189): The material of the volume
> hole is not defined.
>
> parallel beam:
> GateVVolume.cc<http://GateVVolume.cc> (l.189): The material of the volume
> side hole 1 is not defined.
>
> Obviously, the collimator is considered as a bloc of lead with hole
> “drilled” into and it seems,
> that GATE does not know which material the holes a remade of. And I simply
> don’t know how
> to specify the material of the holes.
> Defining the collimator in the “classic” way was to specify lead for the
> collimator volume and
> air for the holes being defined as daughters of the collimator volume.
>
> There are also subtle differences in defining the material:
>  fan beam wants: /gate/fanbeam/setMaterial Lead
> parallel beam wants: /gate/colli/setMaterialName Lead
>
> Did anyone ever succeed to work with the with parametrised collimator setup
> for either type
> or is there any example available??
>
> Many thanks for any help,
>
> Uwe Pietrzyk
>