[Gate-users] PencilBeam source for Gamma Camera validation

[Khalid Hussain]

Dear Gate Users and Experts,

I want to validate the Gamma camera intrinsic spatial resolution for which
you know PencilBeam
<https://opengate.readthedocs.io/en/latest/source_and_particle_management.html#pencil-beam-source>source
is required.

I am using the below scripts for this source which seems to be inaccurate,
please have a look on this script and guide me.

/gate/source/addSource gps PencilBeam
#/gate/source/gps/type PencilBeam
/gate/source/gps/setParticleType gamma
/gate/source/gps/setPosition 0 0 0 mm
/gate/source/gps/setEnergy  140.0 keV
/gate/source/gps/setActivity 3.7 MBq
/gate/source/gps/setSigmaX 2 mm
/gate/source/gps/setSigmaY 2 mm
/gate/source/gps/setSigmaTheta 3.3 mrad
/gate/source/gps/setSigmaPhi 3.8 mrad
/gate/source/gps/setEllipseXThetaEmittance 15 mm*mrad
/gate/source/gps/setEllipseXThetaRotationNorm negative
/gate/source/gps/setEllipseYPhiEmittance 20 mm*mrad
/gate/source/gps/setEllipseYPhiRotationNorm negative


Regards
Khalid Hussain
PhD Student, UPM

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