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Development of a semi-customized tongue displacement device using a 3D printer for head and neck IMRT

 Chae-Seon Hong  ;  Dongryul Oh  ;  Sang Gyu Ju  ;  Yong Chan Ahn  ;  Cho Hee Na  ;  Dong Yeol Kwon  ;  Cheol Chong Kim 
 RADIATION ONCOLOGY, Vol.14(1) : 79, 2019 
Journal Title
Issue Date
Adult ; Aged ; Female ; Head and Neck Neoplasms/radiotherapy* ; Humans ; Male ; Middle Aged ; Organs at Risk/radiation effects* ; Printing, Three-Dimensional/instrumentation* ; Prognosis ; Radiotherapy Dosage ; Radiotherapy Planning, Computer-Assisted/methods* ; Radiotherapy, Intensity-Modulated/methods ; Tongue/physiopathology* ; Tongue/radiation effects
3D printing ; Head and neck cancer ; Tomotherapy ; Tongue displacement
PURPOSE: To reduce radiation doses to the tongue, a patient-specific semi-customized tongue displacement device (SCTDD) was developed using a 3D printer (3DP) for head and neck (H&N) radiation therapy (RT). Dosimetric characteristics of the SCTDD were compared with those of a standard mouthpiece (SMP). MATERIALS AND METHODS: The SCTDD consists of three parts: a mouthpiece, connector with an immobilization mask, and tongue displacer, which can displace the tongue to the contralateral side of the planning target volume. Semi-customization was enabled by changing the thickness and length of the SCTDD. The instrument was printed using a 3DP with a biocompatible material. With the SCTDD and SMP, two sets of planning computed tomography (CT) and tomotherapy plans were obtained for seven H&N cancer patients. Dosimetric and geometric characteristics were compared. RESULTS: Using the SCTDD, the tongue was effectively displaced from the planning target volume without significant tongue volume change compared to the SMP. The median tongue dose was significantly reduced (29.6 Gy vs. 34.3 Gy). The volumes of the tongue receiving a dose of 15 Gy, 30 Gy, 35 Gy, 45 Gy, and 60 Gy were significantly lower than using the SMP. CONCLUSION: The SCTDD significantly decreased the radiation dose to the tongue compared to the SMP, which may potentially reduce RT-related tongue toxicity.
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1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Hong, Chae-Seon(홍채선) ORCID logo https://orcid.org/0000-0001-9120-6132
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