Visualise dose distribution without patient being defined

[grzanka]

We have a DICOM file with 3D dose distrubtion, for example RD*dcm file from here:
https://github.com/APTG/2022_DCPT_LET/tree/main/data/resources/plans/plan2_160MeV
There is no CT data available which define patient geometry.

We would like to display it in pytripgui.
Ideally this should be possible without defining patient geometry.
But if that is too difficult I'd say its ok to define a patient with arbitraty geometry (i.e. 100 bins in X,Y,Z and dimensions 10x10x10cm).

Patient geometry defined in such way may not correspond well to the dose distribution, I hope pytripgui handles nicely dose and CT data defined on a differrent mesh.