[Gate-users] "Fanbeam collimator" doesn't work !!?

[Spencer Lu]

Dear all,



Excuse me!

Since i got stuck in simulating the* “Fan beam collimator”* in the Gate

No matter what material i used in the fan beam collimator,

the output *“ASCII(.dat)”* & *"Root(.root)"* are the *same* as
the*"material=air"
* creates






(My code in the fanbeam collimator , referring the “parameterized fanbeam
collimator” in “*the Gate’s userguide”* )



/gate/SPECThead/daughters/name fanbeam

/gate/SPECThead/daughters/insert collimator

/gate/fanbeam/setMaterial Lead

/gate/fanbeam/geometry/setDimensionY 81 mm

/gate/fanbeam/geometry/setDimensionX 81 mm

/gate/fanbeam/geometry/setFocalDistanceY 0.0 mm

/gate/fanbeam/geometry/setFocalDistanceX 69 mm

/gate/fanbeam/geometry/setHeight 58 mm

/gate/fanbeam/geometry/setSeptalThickness 8 mm

/gate/fanbeam/geometry/setInnerRadius 17 mm





Dose anyone ever met this problem??

How to cope with it?

Thank you !!!



Best Regards



Spencer Lu

Medical Imgaing Processing Lab (MIPL)

Department of Biomedical Engineering and Environmental Sciences,

National Tsing-Hua University, Taiwan