Add support for RTSTRUCT data

[ivmartel]

The DICOM standard defines a RadioTherapy (RT) module with a structure set aimed at transferring patient structures and related data. It must be possible to load it in DWV!

Sources of info:

• In the standard: innolitics:rt-structure-set
• ITK implementation: insight-journal, kitware page.
• Python open source implementation: dicompyler (github repo).

[toskrip]

If you need tester or testing data for this I am happy to help. The first prerequisite would be to allow the loading of whole DICOM study (multiple series) because delineated ROIs in RTSTRUCT series refers to SOP Instances from imaging series (most often CT).

• Java open source implementation: weasis-rt-plugin, github repo

[ivmartel]

More links to the standard (2013):

• Radiotherapy Modules
• Structure Set

Not sure if this functionality could be used in any context, not only radiotherapy, to store ROI information...

[ivmartel]

More info: parse-dicom-rtstruct-into-binary-masks