This value set includes codes based on the following rules:

• Include these codes as defined in http://dicom.nema.org/resources/ontology/DCM

  Code	Display	Definition
  130144	^16^Oxygen nucleus	Ionized oxygen atom with 8 protons and 8 neutrons.
  130143	^12^Carbon nucleus	Ionized carbon atom with 6 protons and 6 neutrons.
  130142	^4^Helium nucleus	Ionized helium atom with 2 protons and 2 neutrons.
  130141	^3^Helium nucleus	Ionized helium atom with 2 protons and 1 neutron.

• Include these codes as defined in http://ncit.nci.nih.gov

  Code	Display
  C597	Ion

• Include these codes as defined in http://snomed.info/sct

  Code	Display
  89177007	Proton