[Gate-users] Gap in Hexagonal LEHR collimator geometry

[Khalid Hussain]

  Dear Han Gyu Kang,

Your shared document about collimator geometry was very helpful for me and
I successfully defined the geometry .

May I request you to share the other such *Gate training materials* that
may help me during the long period of Gate interaction.

Thank you so much for your cooperation.



Regards
Khalid Hussain
PhD Student, UPM


On Mon, Jul 20, 2020 at 7:45 AM Khalid Hussain <khalidhussain1134 at gmail.com>
wrote:

> 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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