RTSTRUCT: Referenced Frame Of Reference Sequence

[Jason Tang]

Hello all,

I am not fully sure of what needs to be inserted in this sequence for my RTSTRUCT file that I am writing. While it is Type 3 tag, I need it because the RTSTRUCT references a CT image set.

Could anyone please verify the correctness of the following?

FrameOfReferenceUID: Should be the same as the one on the CT.

RT Referenced Study Sequence: Is this needed? If so:

Referenced SOP Class UID: UID_DetachedStudyManagementSOPClass
Referenced SOP Instance UID: What to put here?

SeriesInstanceUID: Should be the same as the one on the CT.

Contour Image Sequence: Must reference the entire CT set. The SOP Class UID referenced is UID_CTImageStorage and the SOP Instance is extracted from the individual CTs.

Is there a more elegant way to fill in the Contour Image Sequence?

Many thanks,
Jason