[gate-users] Binning sinograms by scatter?

[evander at physics.ubc.ca]

Thanks, Claude.
I appreciate the fast response. I think modifing the source code may be
the simplest way. I would like to do high statistics studies and the root
files will become too large too quickly. Are there any plans to generalize
the different outputs (especially LMF) so that they are not so linked to
the detector geometry? I imagine list mode data would be useful to many
GATE users.
Best Regards,
Eric

No, there is no option in the sinogram output of the ecat system to
select the events according to their interaction history. To do this,
you have several possibilities:

1) as you mentionned, use the LMF output. However, the current version
of LMF was designed for the clearPET scanner and can handle only a
limited set of geometries (please refer to Ch. Morel email from yesterday).

2) you can use the root output, where this information is stored, and
write a root program (not very complicated) to select the events and
write the sinogram. Mightbe somebody has already such a routine.

3) you can always modify the source code of GATE (src/GateToSinogram.cc,
routine RecordEndOfEvent).

Rgds,

Claude

evander at physics.ubc.ca wrote:

> Hi,
> I'm a new GATE user and I was wondering if there was an option to use the
> ecat system geometry and sinogram output to bin the data based on the
> interaction history of the photons. For example, it would be nice to have
> a separate sinogram for the different orders of Compton scatter that occur
> in the phantom and/or in the detector. Alternatively if there were a way
> to produce LMF data for the ecat system geometry I could just bin them
> into sinograms myself.
> Thanks,
> Eric
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> gate-users mailing list
> gate-users at lphe1pet1.epfl.ch
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>
>
>


-- 
Claude Comtat                                        comtat at ieee.org
Image acquisition and processing group                tel: +33 1 69 86 77 02
Frédéric Joliot Hospital Facility                fax: +33 1 69 86 77 49
French Atomic Energy Commission                 www-dsv.cea.fr/shfj



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