[Gate-users] septa setting

[yuxuan.zhang at di.mdacc.tmc.edu]

Hi, Guocheng,

Have you checked your septa definition? It's only 3 long and thin strips 
along Y-axis near the
center. It does not look like a normal septa definition. And what's your 
source and detector 
definition? 

When you say "there is no difference" you mean "exactly the same" or 
"statistically". If they
are statistically the same that might because the septa thickness is too 
small (0.5mm) and the 
number of septa is small (only 3) too. 

Yuxuan





吴国城--东软派斯通 <wuguocheng at neusoft.com>
Sent by: gate-users-bounces at lists.healthgrid.org
11/27/2007 12:57 AM

 
        To:     gate-users at lists.healthgrid.org
        cc: 
        Subject:        [Gate-users] septa setting



Hi gate-users
I tried to set septa in my simulation system with following scripts:
#       SEPTA
/gate/head/daughters/name septa
/gate/head/daughters/insert box
/gate/septa/placement/setTranslation -1.5 0.0 0.0 cm
/gate/septa/geometry/setXLength 5.0 cm
/gate/septa/geometry/setYLength 32.0 cm
/gate/septa/geometry/setZLength .5 mm
/gate/septa/setMaterial Tungsten
/gate/septa/repeaters/insert cubicArray
/gate/septa/cubicArray/setRepeatNumberX 1
/gate/septa/cubicArray/setRepeatNumberY 1
/gate/septa/cubicArray/setRepeatNumberZ 3
/gate/septa/cubicArray/setRepeatVector 0.0 0.0 10.0 cm
/gate/septa/vis/setColor blue
/gate/septa/attachPhantomSD
Or # /gate/septa/attachCrystalSD.
 
I tried to analysis the total counts with benchmark.C. But I find that 
there is no difference within or without setting septa. 
Any suggestion will be appreciated.
 
Guocheng Wu
Software Department
Neusoft Positron Medical Systems Co.,Ltd.
 
No.2 Xin Xiu Street, Hun Nan New District, Shenyang 110179, PRC
 
Tel: +86 24 836 61980
Fax: +86 24 836 61796
Mobile: +86 13604039065
Email: wuguocheng at neusoft.com
Website: http://medical.neusoft.com 
 

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