[gate-users] hot and cold sphere sources in warm background

[Schmidtlein, Ross/Sloan-Kettering Institute]

Are you correcting for attenuation?  That effect will make most of you
warm background activity appear on the edges.

ross

-----Original Message-----
From: gate-users-bounces at lphe1pet1.epfl.ch
[mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of Mutanga
Theodore
Sent: Tuesday, February 08, 2005 6:18 PM
To: gate-users at lphe1pet1.epfl.ch
Subject: [gate-users] hot and cold sphere sources in warm background


Greetings GATERS

I have tried to design the phantom/source geometry where I have six
spheres in a warm background but I can't see the background source in
the reconstructed image.

I used a cylinder as main phantom, with the six spheres as its
daughters. Then I created to sources and confined them to each of the
spheres and the background source I confined to the mother phantom
cylinder. When I reconstruc the images I only see the hot spheres. can
someone tell me if there is something I overlooked ?

Cheers

Theodore
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