[Gate-users] (no subject)

[Simon Stute]

Hi Ismet,

You set a point/background ratio of 10000 ! it is probably the reason why
you do not see the background in your projection.
Did you try to set a background activity of 1kBq, so that you get a ratio of
10 ?

Cheers,
Simon

On Wed, Feb 16, 2011 at 3:38 PM, Ismet Isnaini <ismeth74 at yahoo.com> wrote:

> dear everyone...
>
> I have been running a simulation using a voxelized source (a simple point
> source
> off the centre) 100x100 voxel of 1 slice.
>
>
> But, instead of using a voxelized phantom, I am using a a cylindrical
> phantom
> and placed the voxelized source inside this phantom. Is this OK ?
>
> The result shows as if it does not recognized the low region of the source
> (The
> hot area was around 10KBq, and the rest is 0 or 1 Bq, and simulation time
> varies
> from 100-500 sec). The sinogram / image produced is a square of 100x100
> voxel of
> not uniform  activity..
>
>
> Can anybody suggest, what was wrong with it ?
>
> regards
>
>
> Ismet
>
>
>
>
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