[Gate-users] Overlap of patient CT with detector

[McNamara Keegan (PSI)]

Dear GATE users,

I am simulating a cylindricalPET system around a patient. The scanner is quite close to the patient and so the voxelised phantom will very often overlap the scanner, typically where the voxels correspond to air. Using the mumap actor I can see this overlap, leading to missing detector segments, and in the root output I can see that these missing segments do not receive any hits.

If I crop the CT then I am trying to fit a square into a circle, and I lose sections of the patient CT.

I have tried reordering the scanner -> patient -> source definitions to see if hierarchy matters, but it appears that the overlap occurs anyway.

What is the best way to solve this issue?

Thanks for your help,
Keegan
________________________________________________
Paul Scherrer Institut
Keegan McNamara
WBBB/105
CH 5232 Villigen PSI

Phone:   +41 56 310 57 62
E-Mail:   keegan.mcnamara at psi.ch<mailto:keegan.mcnamara at psi.ch>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20220121/d7f8e505/attachment.html>