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Doi H, Tanooka M, Ishida T, et al. Utility of intraoral stents in external beam radiotherapy for head and neck cancer. Rep Pract Oncol Radiother. 2017;22(4):310-318doi: 10.1016/j.rpor.2017.03.002.
Doi, H., Tanooka, M., Ishida, T., Moridera, K., Ichimiya, K., Tarutani, K., Kitajima, K., Fujiwara, M., Kishimoto, H., & Kamikonya, N. (2017). Utility of intraoral stents in external beam radiotherapy for head and neck cancer. Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology, 22(4), 310-318. https://doi.org/10.1016/j.rpor.2017.03.002
Doi, Hiroshi, et al. "Utility of intraoral stents in external beam radiotherapy for head and neck cancer." Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology vol. 22,4 (2017): 310-318. doi: https://doi.org/10.1016/j.rpor.2017.03.002
Doi H, Tanooka M, Ishida T, Moridera K, Ichimiya K, Tarutani K, Kitajima K, Fujiwara M, Kishimoto H, Kamikonya N. Utility of intraoral stents in external beam radiotherapy for head and neck cancer. Rep Pract Oncol Radiother. 2017 Jul-Aug;22(4):310-318. doi: 10.1016/j.rpor.2017.03.002. Epub 2017 May 08. PMID: 28515675; PMCID: PMC5425345.
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Rep Pract Oncol Radiother. 2017 Jul-Aug;22(4):310-318. doi: 10.1016/j.rpor.2017.03.002. Epub 2017 May 08.

Utility of intraoral stents in external beam radiotherapy for head and neck cancer.

Reports of practical oncology and radiotherapy : journal of Greatpoland Cancer Center in Poznan and Polish Society of Radiation Oncology

Hiroshi Doi, Masao Tanooka, Toshihisa Ishida, Kuniyasu Moridera, Kenji Ichimiya, Kazuo Tarutani, Kazuhiro Kitajima, Masayuki Fujiwara, Hiromitsu Kishimoto, Norihiko Kamikonya

Affiliations

  1. Department of Radiology, Hyogo College of Medicine, Hyogo, Japan.
  2. Department of Radiation Oncology, Meiwa Cancer Clinic, Hyogo, Japan.
  3. Department of Radiological Technology, Hyogo College of Medicine College Hospital, Hyogo, Japan.
  4. Department of Oral and Maxillofacial Surgery, Hyogo College of Medicine, Hyogo, Japan.

PMID: 28515675 PMCID: PMC5425345 DOI: 10.1016/j.rpor.2017.03.002

Abstract

AIM: This study aimed to assess the utility and stability of intraoral stent during intensity-modulated radiation therapy (IMRT).

BACKGROUND: The benefits of intraoral stents in radiotherapy are unclear.

MATERIALS AND METHODS: We analyzed 386 setup errors in 12 patients who received IMRT for head and neck cancers without intraoral stents (intraoral stent [-]) and 183 setup errors in 6 patients who received IMRT with intraoral stents (intraoral stent [+]). All patients were matched according to the immobilization method (masks and boards). Setup errors were measured as the distance from the initial setup based on the marking on the skin and mask to the corrected position based on bone matching on cone beam computed tomography.

RESULTS: The mean interfractional setup errors in the right-left, craniocaudal, anterior-posterior (AP), and three-dimensional (3D) directions were -0.33, 0.08, -0.25, and 2.75 mm in the intraoral stent (-) group and -0.37, 0.24, -0.63, and 2.42 mm in the intraoral stent (+) group, respectively (

CONCLUSION: Setup errors can be significantly reduced in the AP and 3D-directions by using intraoral stents.

Keywords: Bite block immobilization; Head and neck cancer; Intensity modulated radiation therapy; Radiotherapy; Setup error

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