[Gate-users] hot lesions in cylinderical background

[Marc Chamberland]

Hi Bassim,

The way you described it should work: I've done it before myself. If you list your sources before starting your simulation (by using /gate/source/list), is your background source listed? If you look at the coincidences, for example in the Root output, do you see events coming from your background source?

Marc



__________________________

Marc Chamberland, MSc
PhD candidate
Department of Physics
Carleton University
Ottawa (ON)

On 2013-09-05, at 9:41 AM, bassim aklan <bassim.aklan at imp.uni-erlangen.de>
 wrote:

> Hello Gate users,
> Does someone know, how I can put hot sphere lesions in cylinderical background. I have defined a cylinderical phantom and put spheres with different sizes inside it. I set an activity of 427000 Bq for the background and 17000 Bq activity for the hot sphere lesions in order to get a ratio of 4:1. When I generate a sinogram and reconstruct it. I see only the hot lesions without the background. Can anyone help me with this issue. I appreciate your support and help.
> 
> Cheers,
> bassim
> 
> -- 
> Bassim Aklan, MSc.
> Institute of Medical Physics - Section for MR Imaging
> University of Erlangen-Nuremberg
> Henkestr. 91
> 91052 Erlangen, Germany
> phone: +49-(0)9131/85-25545
> bassim.aklan at imp.uni-erlangen.de
> 
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