[Gate-users] Specifying the source activity

[Park MinJae]

Dear KB,

It's total activity in a source volume...

You have to take account into the volume for concentration...

Good Luck,
MJ

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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 KB
Sent: Tuesday, April 01, 2008 6:48 AM
To: gate-users at lists.healthgrid.org
Subject: [Gate-users] Specifying the source activity

Hello All,

     Reading the Gate user manual, it is not clear what the activity
is: is it the concentration or the total activity?

    In other words, what exactly am I specifying when the macro file says

/gate/source/F18HOTSPOT/setActivity 0.0001 Ci
/gate/source/F18HOTSPOT/gps/type Volume /gate/source/F18HOTSPOT/gps/shape
Sphere /gate/source/F18HOTSPOT/gps/radius 0.5 mm

   Is that a concentration of 0.0001 Ci/cc or   0.0001 Ci /
(4/3.PI.(0.5^3)) cc.

    Thanks.


KB
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