# OnCo record ring-gantry-linac (technology). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)". Whole corpus: https://onco.cc/api/v1/onco.nt
@prefix schema: <https://schema.org/> .
@prefix onco: <https://onco.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://onco.cc/technologies/ring-gantry-linac/>
  a schema:MedicalTherapy ;
  onco:kind "technology" ;
  schema:identifier "ring-gantry-linac" ;
  schema:name "Ring-gantry linacs (Halcyon, Ethos)"@en ;
  schema:description "A radiotherapy machine built like a CT scanner: the accelerator spins inside an enclosed ring, must image the patient before every dose, and treats fast. Ethos adds software that redraws the plan to the anatomy of the day while the patient lies on the couch."@en ;
  schema:url <https://onco.cc/technologies/ring-gantry-linac/> ;
  schema:dateModified "2026-09-17"^^xsd:date ;
  schema:citation <https://www.varian.com/products/radiotherapy/treatment-delivery/halcyon>, <https://www.varian.com/products/adaptive-therapy/ethos> ;
  onco:status "established" ;
  onco:tag "machines-wave" ;
  onco:related <https://onco.cc/technologies/c-arm-linac/>, <https://onco.cc/technologies/tomotherapy/>, <https://onco.cc/technologies/mr-linac/>, <https://onco.cc/technologies/radiotherapy-access-gap/> ;
  onco:cancers <https://onco.cc/cancers/prostate/>, <https://onco.cc/cancers/breast-cancer/>, <https://onco.cc/cancers/head-and-neck/>, <https://onco.cc/cancers/cervical/>, <https://onco.cc/cancers/muscle-invasive-bladder-cancer/>, <https://onco.cc/cancers/colorectal/> ;
  onco:sections <https://onco.cc/fronts/radiation/>, <https://onco.cc/fronts/devices/> ;
  onco:technologies <https://onco.cc/technologies/imrt-igrt/>, <https://onco.cc/technologies/adaptive-radiotherapy/>, <https://onco.cc/technologies/vmat/>, <https://onco.cc/technologies/auto-contouring-ai/> ;
  onco:companies <https://onco.cc/companies/varian/> .