[Gate-users] Gap in Hexagonal LEHR collimator geometry

[Khalid Hussain]

Dear 강한규,

Thank you so much,
really appreciate it.


Regards
Khalid Hussain
PhD Student, UPM


On Mon, Jul 20, 2020 at 7:17 AM 강한규 <lovehangulp at naver.com> wrote:

> Dear Hussain,
>
>
>
> Please see the attached slide#18-25 to define hexagonal collimators.
>
> The slide was presented in the GATE training course at Tohoku Univeristy
> (Feb-2020).
>
>
>
> It seems that you missed the definition of linear repeater.
>
> In addition to that, pitches of hole with cubicArray repeater for x- and
> y- directions should NOT be same.(see the slide#20)
>
>
>
> Hopefully, you can succeed in defining your own hesagonal collimators in
> GATE.
>
>
>
> Best regards,
>
>
>
> Han Gyu Kang
>
>
> --------Han Gyu Kang, Ph.D, Researcher
>
> National Institute of Radiological Sciences (NIRS)
> National Institutes for Quantum and Radiological Science and Technology
> (QST)
>  4-9-1 Anagawa, Inage-ku, Chiba 263-8555, JAPAN
>
>
>
> -----Original Message-----
> *From:* "Khalid Hussain"<khalidhussain1134 at gmail.com>
> *To:* <Gate-users at lists.opengatecollaboration.org>;
> *Cc:*
> *Sent:* 2020-07-20 (월) 10:16:11 (GMT+09:00)
> *Subject:* [Gate-users] Gap in Hexagonal LEHR collimator geometry
>
> Dear gate users,
>
> There are small gaps in the collimator geometry. The collimator is
> standard multi hole LEHR collimator for spect camera. The screenshot of
> geometry and script is attached.
>
> Please check and help me where the problem is in geometry.
>
> Thank you.
> Khalid
> [image: collimator2_4.24.PNG]
> [image: collimator1_4.24.PNG]
>
>
> Collimator dimensions are x =59.1 cm, y= 44.5cm, z=2.405cm
> /gate/collimator/daughters/name hole
> /gate/collimator/daughters/insert hexagone
> /gate/hole/geometry/setHeight 24.05 mm
> /gate/hole/geometry/setRadius  0.555 mm
> /gate/hole/placement/setRotationAxis 1 0  0
> /gate/hole/placement/setRotationAngle 0 deg
> /gate/hole/setMaterial Air
> /gate/hole/vis/forceWireframe
> /gate/hole/vis/setColor cyan
>
> # FILL THE WHOLE COLLIMATOR WITH SEPTA-HOLE
> /gate/hole/repeaters/insert cubicArray
> /gate/hole/cubicArray/setRepeatNumberX 465
> /gate/hole/cubicArray/setRepeatNumberY 350
> /gate/hole/cubicArray/setRepeatNumberZ 1
> /gate/hole/cubicArray/setRepeatVector 1.27 1.27 0.0 mm
>
> Any help will be highly appreciated.
>
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