Development of a device that remotely removes a mask in the head and neck immobilization system: a prototype and demonstration experiment

Radiol Phys Technol. 2022 Sep;15(3):249-254. doi: 10.1007/s12194-022-00663-5. Epub 2022 Jul 6.


In this study, a prototype device was developed to quickly remove the mask used to immobilize the head and neck by remotely releasing the quick fasteners. As a first step in investigating the usefulness of this prototype, we performed repeated removal tests and examined the accuracy of dose calculation. The results showed that the quick-release fasteners of a Type-S system (CIVCO Medical Solutions, Iowa, USA) could be removed remotely and accurately (success rate: 100%). Additionally, the dose errors in treatment planning were negligible (< 1.0%), and the gamma pass rate was equivalent (99.9%). Therefore, this prototype device with a remote system would help manage patient safety in emergencies, such as a disaster or a sudden change in the patient's condition. However, age-related deterioration with long-term clinical use or its ability to link with beam-off still requires further exploration.

Keywords: Immobilization system; Quick fastener; Remote removal; Safety management system; Thermoplastic mask.

MeSH terms

  • Head
  • Head and Neck Neoplasms* / radiotherapy
  • Humans
  • Immobilization* / methods
  • Neck
  • Radiotherapy Planning, Computer-Assisted / methods