Is it possible to copy existing rigid registration?

[mfizyczka]

I would like to use rigid OnlineMatch as a starting point for deformable registration. But I don't want to change OnlineMatch registration itself which would be done if I load it and then run deformable registration. How can I copy this registration?

My current code:

  # select online match registration:
  for r in primaryVolume.getLinkedRegistrations(): 
    if r.getTargetVolume().getVelocityId() == cbctId and 'ONLINEMATCH' in r.getName():
      #  registrationId = r.getVelocityId()
      cbctRegistration = engine.loadRegistration(r.getVelocityId())
      print('\t\tLoading pCT-CBCT ONLINEMATCH.', engine.getErrorMessage())

  # perform deformable registration:
  deformableRegistrationSettings = velocity.DefaultBSplineDeformableRegistrationSettings()
  # PreprocessingFilterMethod: CBCTCorrectionSecondary = 4
  deformableRegistrationSettings.preprocessingMethod = 4
  # Deformable registration Type:
  deformableRegistrationSettings.type = velocity.DeformableMultiPass
  regOps.performBsplineRegistrationDICOM(deformableRegistrationSettings)
  regOps.saveRegistration()

[jakecobb]

Load the registration and then create a new registration, it will start as a copy of the one you loaded.

[mfizyczka]

Thanks a lot @jakecobb
Is there a way to get a list of loaded objects? Just to make sure that in a long code I'm not copying registration only when I intend to do so?