Voxel sampling rate for optimisation?

General
1

One thing I do not understand is the resolution/sampling rate that is used in optimisation. Where is that set and what are the defaults?
Suppose I have a very large OAR/CTV/structure, and I only want 20% of the voxels for optimisation, i.e. dose influence matrices for 20% of the volume. Is that somehow possible to configure?

2

Hi Wens,

Welcome to OpenTPS and thanks for contributing with your question.

Here is an answer:

We do not support yet a parameter that sets the % of voxels on which you want to optimize. I suppose you are referring to DVH optimization functions (e.g. D1<20Gy) ? Nevertheless, we are organizing an “OpenTPS camp” internally in 2 weeks and the implementation of such functions has high priority. It should therefore be merged into master by the end of the month.

3

Hi @Wens,

DVH objectives (among others) have now been added for plan optimization and merged to the master branch (Merge request !164). Let us know if it run into into any trouble