{description: 'Unit to characterize the energy spectrum used for imaging in Image Guided Radiotherapy (IGRT).\nFor photons, the maximum acceleration voltage is given in MV or kV, although those are not units of energy.', package_name: hl7.fhir.us.codex-radiation-therapy, name: ImageGuidedRadiotherapyEnergyUnitVS, type: null, package_version: 2.0.0, class: unknown, kind: null, url: 'http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-image-guided-radiotherapy-energy-unit-vs', version: 2.0.0}