title: Three-dimensional customized bolus for intensity-modulated radiotherapy in a patient with Kimura's disease involving the auricle.
abstract: In radiotherapy, a commercial bolus often does not provide a suitable fit over irregular surfaces. To address this issue, we fabricated a customized bolus using 3D printing technology. The aim of our study was to evaluate the application of this 3D-printed bolus in a clinical setting. The patient was a 45-year-old man with recurrent Kimura's disease involving the auricle, receiving radiotherapy in our oncology department. A customized bolus, 5mm in thickness, was fabricated based on reconstruction of computed tomography (CT) images. The bolus was printed on a Dimension 1200 series SST 3D printer. Repeat CT-based simulation indicated an acceptable fit of the 3D-printed bolus to the target region, with a maximum air gap of less than 5mm at the tragus. Most of the surface area of the target region was covered by the 95% isodose line. The plan with the 3D-printed bolus improved target coverage compared to that without a bolus. And the plan with the 3D-printed bolus yielded comparable results to those with the paraffin wax bolus. In conclusion, a customized bolus using a 3D printer was successfully applied to an irregular surface.
authors.affiliation: Yeungnam University College of Medicine, Department of Radiation Oncology, 170, Hyeonchung-ro, Nam-gu, Daegu, 42415, South Korea.
authors.forename: J W
authors.initials: JW
authors.lastname: Park
authors.affiliation: Yeungnam University College of Medicine, Department of Radiation Oncology, 170, Hyeonchung-ro, Nam-gu, Daegu, 42415, South Korea. Electronic address: yjw1160@ynu.ac.kr.
authors.forename: J W
authors.initials: JW
authors.lastname: Yea
mesh_terms: D000796:Angiolymphoid Hyperplasia with Eosinophilia / Q000532:radiotherapy*; D054644:Ear Auricle / Q000000981:diagnostic imaging; D004427:Ear Diseases / Q000532:radiotherapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D066330:Printing, Three-Dimensional; D050397:Radiotherapy, Intensity-Modulated / Q000379:methods*; D014057:Tomography, X-Ray Computed
keywords: 3D printer; Bolus individualisé; Customized bolus; Imprimante 3D; Kimura's disease; Maladie de Kimura; RCMI