- Head/neck cancer
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Development of a Tongue Immobilization Device Using a 3D Printer for Intensity Modulated Radiation Therapy of Nasopharyngeal Cancer Patients
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Sang Gyu Ju, Yong Chan Ahn, Yeong-bi Kim, Seung Gyu Park, Yoo-mi Choi, Cho Hee Na, Chae-Seon Hong, Dongryul Oh, Dong Yeol Kwon, Cheol Chong Kim, Dong Hyeon Kim
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Cancer Res Treat. 2021;53(1):45-54. Published online September 15, 2020
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DOI: https://doi.org/10.4143/crt.2020.572
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 Abstract
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- Purpose
This study aimed to reduce radiation doses to the tongue, a patient-specific semi-customized tongue immobilization device (SCTID) was developed using a 3D printer for helical tomotherapy (HT) of nasopharyngeal cancer (NPCa). Dosimetric characteristics and setup stability of the SCTID were compared with those of a standard mouthpiece (SMP).
Materials and Methods
For displacement and robust immobilization of the tongue, the SCTID consists of four parts: upper and lower tooth stoppers, tongue guider, tongue-tip position guide bar, and connectors. With the SCTID and SMP, two sets of planning computed tomography and HT plans were obtained for 10 NPCa patients. Dosimetric and geometric characteristics were compared. Position reproducibility of the tongue with SCTID was evaluated by comparing with planned dose and adaptive accumulated dose of the tongue and base of the tongue based on daily setup mega-voltage computed tomography.
Results
Using the SCTID, the tongue was effectively displaced from the planning target volume compared to the SMP. The median mucosa of the tongue (M-tongue) dose was significantly reduced (20.7 Gy vs. 27.8 Gy). The volumes of the M-tongue receiving a dose of 15 Gy, 30 Gy, and 45 Gy and the volumes of the mucosa of oral cavity and oropharynx (M-OC/OP) receiving a dose of 45 Gy and 60 Gy were significantly lower than using the SMP. No significant differences was observed between the planned dose and the accumulated adaptive dose in any dosimetric characteristics of the tongue and base of tongue.
Conclusion
SCTID can not only reduce the dose to the M-tongue and M-OC/OP dramatically, when compared to SMP, but also provide excellent reproducibility and easy visual verification.
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Citations
Citations to this article as recorded by  - A Novel Immobilization Method for the Treatment of Head and Neck Cancer Using 3D Printing
Christopher Szewczyk, Yixiang Liao, Samer Al-Khudari, Michael J. Jelinek, Ken Tatebe
Practical Radiation Oncology.2024; 14(1): 20. CrossRef - Novel tongue-positioning device to reduce tongue motions during radiation therapy for head and neck cancer: Geometric and dosimetric evaluation
Seongmoon Jung, Bitbyeol Kim, Sung Young Lee, Won Ick Chang, Jaeman Son, Jong Min Park, Chang Heon Choi, Joo Ho Lee, Hong-Gyun Wu, Jung-in Kim, Jin Ho Kim, Minsoo Chun
PLOS ONE.2023; 18(9): e0291712. CrossRef - Dosimetric comparison between VMAT plans using the fast-rotating O-ring linac with dual-layer stacked MLC and helical tomotherapy for nasopharyngeal carcinoma
Sang Gyu Ju, Yong Chan Ahn, Yeong-bi Kim, Jin Man Kim, Dong Yeol Kwon, Byoung Suk Park, Kyungmi Yang
Radiation Oncology.2022;[Epub] CrossRef - Tongue Displacement Device in Decreasing the Radiation Dose to Tongue and Preventing Proton Beam Overshoot in Proton Therapy for Unilateral Head and Neck Cancer
Chae-Seon Hong, Dongryul Oh, Sang Gyu Ju, Yong Chan Ahn, Yeong-bi Kim, Seyjoon Park, Woojin Lee
Frontiers in Physics.2021;[Epub] CrossRef
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