Source shape and collimation

Dear all,
is it possible to shape the source in order to have a rectangular footprint (2d fov), as in the case of CT or radiography? Are there any examples?

Thanks for the help

Hi,
Yes it is possible, you have a complete example of CT in the manual:
https://doc.ggems.fr/v1.2/example_2.html

And also a description of the source:
https://doc.ggems.fr/v1.2/sources.html

Kind regards
Didier