[Gate-users] reading CylindricalPET ROOT files in STIR

[Thielemans, Kris]

Hi all

As you know, Nikos put code into our development version of STIR to read ROOT files (it needs an additional text file to specify some scanner info). This should handle CylindricalPET and ECAT output. We're checking this now and have identified 2 "issues"

https://github.com/UCL/STIR/issues/80
https://github.com/UCL/STIR/issues/79

The main problem is that CylindricalPET has 1 extra level of hierarchy:
CylindricalPET: RSector, Module, Submodule, Crystal
STIR: bucket, block, crystal

We're debating how to map the CylindricalPET case to STIR. However to make a sensible decision, can someone please clarify what the consequences are of the cylindricalPET hierarchy? I realise you can use this do specify geometry (via the repeaters). Does it also have anything to do with dead-time processing?

Also, can RSector to repetition along the scanner axis as well, or only rotation?

Of course, feel free to add comments to the Issues above. If not, I'll summarise this email thread and put it on github as well.
Please reply to both gate-users at lists.opengatecollaboration.org and stir-devel at lists.sourceforge.net

Many thanks

Kris Thielemans
Reader in Medical Imaging Physics at University College London,
Institute of Nuclear Medicine, UCL Hospital, Tower 5,
235 Euston Road, London NW1 2BU, UK

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