Link Observations to Files or Procedures?

[diatomsRcool]

Do we need a way to say a particular observation, like cardiac output, came from a file, like a cardiac MRI? Would we say that the cardiac MRI file resulted from an imaging procedure? How would we link these three things together?

[bfurner]

Some initial thoughts.

FHIR's ImagingStudy resource references the procedure it is from using an attribute named partOf. In a similar vein, we could link from File to Procedure using an associated_procedure attribute, or similar.

Along those lines, FHIR's Observation resource can reference an ImagingStudy it is from using an attribute named partOf. We could link from Observation to File in a similar manner.