How to create a conical source (mamography) in Vgate

[Alexander Camargo]

I am new in Vgate software.
I've tried a lot of things, but nothing works. I need to create a conical source that is 4 cm in radius and 16 cm in length. Example in photo attached

 

[Alex A]

Do you mean a conical source, a conical shaped volume which emits, or do you mean a conical beam? You can set min and max emission angles for sources.

 

[Alexander Camargo]

Do you mean a conical source, a conical shaped volume which emits, or do you mean a conical beam? You can set min and max emission angles for sources.

conical beam with a focal spot of 0.3mm. The focal spot is not problema, my problem is create a conical beam

 

[gleem]

A conical beam for a point source is produced with a circular aperture.

 

[Alex A]

A shadow mask is functional but may be inefficient.

Consider editing the source parameters to something like;

# SET THE ANGULAR DISTRIBUTION OF EMISSION
/gate/source/yoursourcename/gps/angtype iso
# SET MIN AND MAX EMISSION ANGLES
/gate/source/yoursourcename/gps/mintheta 0. deg
/gate/source/yoursourcename/gps/maxtheta 14. deg
/gate/source/yoursourcename/gps/minphi    0. deg
/gate/source/yoursourcename/gps/maxphi 360. deg

This is the spherical physics coordinate system. This should produce a conical beam in the Z direction.

Redo the trig to get a more accurate angle if you need it.