Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Manufacturing a Functional Bolus Using a 3D printer in Radiation Therapy

방사선치료에서 3D 프린터를 이용한 기능적 조직보상체의 제작

  • Lee, Yi-Seong (Dept. of Radiation Oncology, Catholic Kwandong University International St. Mary's Hospital) ;
  • Kim, Jeong-Koo (Dept. of Radiological Science, Hanseo University)
  • 이이성 (가톨릭관동대학교 국제성모병원 방사선종양학과) ;
  • 김정구 (한서대학교 방사선학과)
  • Received : 2020.01.15
  • Accepted : 2020.02.28
  • Published : 2020.02.28
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Abstract

Commercial plate bolus is generally used for treatment of surface tumor and required surface dose. We fabricated 3D-printed bolus by using 3D printing technology and usability of 3D-printed bolus was evaluated. RT-structure of contoured plate bolus in the TPS was exported to DICOM files and converted to STL file by using converting program. The 3D-printed bolus was manufactured with rubber-like translucent materials using a 3D printer. The dose distribution calculated in the TPS and compared the characteristics of the plate bolus and the 3D printed bolus. The absolute dose was measured inserting an ion chamber to the depth of 5 cm and 10 cm from the surface of the blue water phantom. HU and ED were measured to compare the material characteristics. 100% dose was distributed at Dmax of 1.5 cm below the surface when was applied without bolus. When the plate bolus and 3D-plate bolus were applied, dose distributed at 0.9 cm and 0.8 cm below the surface of the bolus. After the comparative analysis of the radiation dose at the reference depth, differences in radiation dose of 0.1 ~ 0.3% were found, but there was no difference dose. The usability of the 3D-printed bolus was thus confirmed and it is considered that the 3D-printed bolus can be applied in radiation therapy.

Keywords

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