[Gate-users] Hexagon(e) specification

[Park MinJae]

Dear Alan,

You can make the collimator without 'hole'.
That's why I said about the material.

Imagine the making sequence as the GATE's side...
or Look at the screen carefully...
Execution line by line is basic but easy to figure out what's going on...

Good Luck,
MJ

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//  Park MinJae
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//
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-----Original Message-----
From: gate-users-bounces at lists.healthgrid.org
[mailto:gate-users-bounces at lists.healthgrid.org] On Behalf Of Alan J Green
Sent: Monday, November 19, 2007 8:08 PM
To: Park MinJae; gate-users at lists.healthgrid.org
Subject: RE: [Gate-users] Hexagon(e) specification

Now I am confused! Why (and how for that matter) does the definition of a
hexagon depend on the material? Can you explain, or point me to a reference
where I can find an explanation, please?

With thanks

Alan
At 01:34 16/11/2007, Park MinJae wrote:

>Dear Alan,
>
>Technically, your question depends on what material of hole you want to 
>make...
>
>In common, hole is made by air...so the radius means one of inscribed 
>circle...
>
>Cheers,
>MJ
>
>//=================================================
>//  Park MinJae
>//  SNU BME Ph.D. Candidate
>//
>//  DialTo:+82-17-711-7809
>//  MailTo:MJ at ToTi.us
>//
>//  Make the Dream True...
>//=================================================
>
>
>-----Original Message-----
>From: gate-users-bounces at lists.healthgrid.org
>[mailto:gate-users-bounces at lists.healthgrid.org] On Behalf Of Alan J 
>Green
>Sent: Thursday, November 15, 2007 10:21 PM
>To: gate-users at lists.healthgrid.org
>Subject: [Gate-users] Hexagon(e) specification
>
>When modelling a gamma camera collimator the first hole is specified:
>
>/gate/collimator/daughters/name hole
>/gate/collimator/daughters/insert hexagone 
>/gate/hole/geometry/setLength 6.0 cm /gate/hole/geometry/setRadius .381 
>cm
>
>(it's a HEGP collimator)
>
>I think the radius is the radius of the circumscribed (rather than the 
>inscribed) circle; can anyone who knows confirm this (or correct it), 
>please?
>
>With thanks
>Alan
>
>Dr Alan J Green
>Senior Lecturer
>Cancer Research UK Targeting and Imaging Group UCL Tel (+44) (0)20 7472 
>6373 Fax (+44) (0)20 7794 3341
>
>_______________________________________________
>Gate-users mailing list
>Gate-users at lists.healthgrid.org
>http://lists.healthgrid.org/mailman/listinfo/gate-users

Dr Alan J Green
Senior Lecturer
Cancer Research UK Targeting and Imaging Group UCL Tel (+44) (0)20 7472 6373
Fax (+44) (0)20 7794 3341 

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