The new Composite Instance shall contain the Contributing Equipment Sequence (0018,A001).

[malaterre]

I believe some part of the standard have not yet been implemented in the classic to enhanced conversion step:

• http://dicom.nema.org/medical/dicom/current/output/chtml/part04/sect_C.3.5.html

The new Composite Instance shall contain the Contributing Equipment Sequence (0018,A001). If the source Composite Instances already contain the Contributing Equipment Sequence with a consistent set of Item values (excluding Contribution DateTime (0018,A002)), then a new Item shall be appended to the copy of the sequence in the new Composite Instance; if the source Composite Instance does not contain the Contributing Equipment Sequence or the Item values (excluding Contribution DateTime (0018,A002)) differ between source instances, then Contributing Equipment Sequence shall be created, containing one new Item. In either case, the new Item shall describe the equipment that is creating the new Composite Instance, and the Purpose of Reference Code Sequence (0040,A170) within the Item shall be (109106, DCM, "Enhanced Multi-frame Conversion Equipment") and the Contribution Description (0018,A003) shall be "Legacy Enhanced Image created from Classic Images", "Classic Image created from Enhanced Image", or "Updated UID references during Legacy Enhanced Classic conversion" as appropriate.

[CPBridge]

Hi @malaterre, thanks a lot for reporting this issue.

Unfortunately the Legacy Conversion part of the library has not got much love recently. There are known shortcomings and a long-standing PR (#34) that should greatly improve this part of the library, kindly contributed by @afshinmessiah, but it needs a little work from the core developers and we have unfortunately had other priorities over the last couple of months.

It looks like #34 should address the specific point you raise here. I will leave this issue open so that we can revisit after #34 is merged