Is it possible to package geometry / source definitions as new objects?

[jburz2001]

Hello. I am trying to simulate the behavior of an x-ray source in an x-ray vault. To do so, I need to construct the x-ray source in EGSnrc. Is it possible for me to "package" the geometry / source definitions for such an object as a single object that I can easily reference, geometrically transform, change parameters for, etc. in a separate .egsinp file?

Basically, I want to build a digital twin of the following device and use it when needed: https://xray.comet.tech/en/products/mxc-450-mf. CT scanners sometimes revolve the x-ray source around the target, hence why I'd like to be able to geometrically transform an object like this as a whole.

[rtownson]

There's not an easy way to do this how you are imagining, unfortunately. This is particularly because the geometry and source are fundamentally separate - the source location isn't really tied to a particular geometry. You'll have to create transformations for both of them, using egs_transformedGeometry and egs_transformedSource, but at least the transformations will be the same.

It's possible to define a geometry in an external file: https://nrc-cnrc.github.io/EGSnrc/doc/pirs898/group__Geometry.html#ga5bc12ceac1e65f64b3c7d3b62e4ce4ff

One option could be to have a python script that inserts both the geometry and source, copying from your "x-ray source" input file into another input file.

[jburz2001]

Thanks for letting me know. Creating a Python file should do the trick. If I want to perform a simulation of the x-ray source revolving around a target then perhaps I can generate Python code for each angle and save the results in .txt files that I can then compile as a single simulation. Also, I'm glad to see that one can define geometry in an external file!