# CASToR vs Gate PETscanner system root.output vs It is possible to do reconstruction of my Gate phantom using TOF ....

**URL:** <https://castor-project.discourse.group/t/castor-vs-gate-petscanner-system-root-output-vs-it-is-possible-to-do-reconstruction-of-my-gate-phantom-using-tof/62>\
**Category:** General Discussions\
**Created:** [June 20, 2018, 2:49pm UTC](https://castor-project.discourse.group/t/castor-vs-gate-petscanner-system-root-output-vs-it-is-possible-to-do-reconstruction-of-my-gate-phantom-using-tof/62 "2018-06-20T14:49:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Dania\_Consuegra](https://avatars.discourse-cdn.com/v4/letter/d/cc9497/32.png) [@Dania\_Consuegra](https://castor-project.discourse.group/u/Dania_Consuegra)\
**Post date:** [June 20, 2018, 2:49pm UTC](https://castor-project.discourse.group/t/castor-vs-gate-petscanner-system-root-output-vs-it-is-possible-to-do-reconstruction-of-my-gate-phantom-using-tof/62/1 "2018-06-20T14:49:52Z")

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Dear CASToR users,

I’m a beginner using CASToR so here I have some questions….

I installed CASToR and using the _NucMed_ plugin in _Fiji_ I checked the agreement between the references images that you provide and my results for both benchmark about PET.

So, now I’m try to convert my Gate root.output into CASToR and I can’t ….

I’m studying the Cherenkov Photons coincidences and the influence of the TOF in the reconstructed images and for that I’m using a PETscanner system from Gate. I have 4 rings of 48 detectors blocks each ring. Each block is a matrix of 13 x 13 detectors of (4x4x20) mm….

It is possible to use somehow CASToR with my Gate PETscanner system root.output or geometry.mac instead …or is CASToR just compatible with Gate if I where using a CylindricalPET or ECAT system….

Any help I would really appreciate it….

Kind regards,

Dania Consuegra Rodríguez

Phd student _ **Jožef Stefan Institute** _

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**Author:** ![Maxime\_Toussaint](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Maxime\_Toussaint](https://castor-project.discourse.group/u/Maxime_Toussaint)\
**Post date:** [June 20, 2018, 3:03pm UTC](https://castor-project.discourse.group/t/castor-vs-gate-petscanner-system-root-output-vs-it-is-possible-to-do-reconstruction-of-my-gate-phantom-using-tof/62/2 "2018-06-20T15:03:53Z")

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Hi,

It is not possible to use CASToR as-is for your scanner definition: you would need to give a pre-computed LUT file or implement the conversion of your format to a .geom. However, I think it would by simpler for you to write your geometry.mac as a CylindricalPET. I might be wrong, but your scanner geometry seems easy to implement in the CylindricalPET "format".

Have a nice day,  
Maxime Toussaint