[Gate-users] ARF fails to produce output

[Matthew Strugari]

Hi everyone,

Do any of you have a working example of the angular response functions from the ARF or SPECT_FFD examples in the GateContrib folders?

I could also use some clarification on a couple of things. First, the ARF example contains some errors/unclear settings such as the generation of the ARF tables using 364.5 keV photons and then the computation of the ARF tables using a reference energy of 140. keV. I assume this is a typo and 364.5 keV should be the reference energy but this discrepancy is present in both the readthedocs and the ARF macro files. Second, the readthedocs doesn't instruct users to set

  *   /gate/systems/SPECThead/setProjectionPlane <> <Unit>

where <> <Unit> "sets the YZ projection plane relative to the ARF device center". Is this line no longer required and does ARF only work with detectors in the YZ plane? My setup places my detector in the ZX plane and I cannot get any output to be produced. In all cases, the analog simulation produces output but the ARF simulation does not. I have attached the terminal output following execution of the SPECT_FFD angularResponseFunctionSPECT.mac simulation. It appears as though the ARF tables are not being loaded correctly.

Regards,

Matthew


--

Matthew Strugari

Biomedical Translational Imaging Centre - BIOTIC,
5890 University Ave,
Halifax, NS, B3K 6R8
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