[Gate-users] Geometry

[Jerome Crocco]

Hello,

Can someone recommend a solution for incorporating important structures
into the Gate model.   Specifically,

1)  I would like to design an Antiscatter grid such as those commonly used
in fan beam or cone beam CT.  I would like to design a focusing type
Collimator,  but there is some difficulty as geometry editor does not
permit anything more than basic geometries.   I was considering a tall
trapezoid,  and performing a ring pattern operation to generate a focusing
type grid,  but this is not correct because a ring operation would give the
antiscatter grid some radius,  creating a gap between the detector and anti
scatter grid.

2)   I would like to use some standard phantoms. I feel this has probably
already done. Is there some place I can download geometry?

Cheers

Jerome
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