Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Evaluation of the Usefulness of Patient Customized Shielding Block Made with 3D Printer in the Skin Cancer Electron Beam Therapy

전자선치료 시 3D 프린터로 제작한 환자 맞춤형 차폐체의 유용성 평가

  • Ahn, Ki-Song (Department of Radiologic Technology Daegu Health College) ;
  • Jung, Woo-Chan (Department of Radiologic Technology Daegu Health College) ;
  • Kim, Dae-Hyun (Department of Radiation Oncology, Kangbuk Samsung Hospital) ;
  • Kim, Moo-Sub (Department of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, Catholic University of Korea) ;
  • Yoon, Do-Kun (Department of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, Catholic University of Korea) ;
  • Shim, Jae-Goo (Department of Radiologic Technology Daegu Health College) ;
  • Suh, Tae-Suk (Department of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, Catholic University of Korea)
  • 안기송 (대구보건대학교 방사선과) ;
  • 정우찬 (대구보건대학교 방사선과) ;
  • 김대현 (강북삼성병원 방사선종양학과) ;
  • 김무섭 (가톨릭대학교 의공학교실) ;
  • 윤도군 (가톨릭대학교 의공학교실) ;
  • 심재구 (대구보건대학교 방사선과) ;
  • 서태석 (가톨릭대학교 의공학교실)
  • Received : 2019.12.05
  • Accepted : 2019.12.26
  • Published : 2019.12.31
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Abstract

In order to improve and supplement the shielding method for electron beam treatment, we designed a patient-specific shielding method using a 3D printer, and evaluated the usefulness by comparing and analyzing the distribution of electron beam doses to adjacent organs. In order to treat 5 cm sized superficial tumors around the lens, a CT Simulator was used to scan the Alderson Rando phantom and the DICOM file was converted into an STL file. The converted STL file was used to design a patient-specific shield and mold that matched the body surface contour of the treatment site. The thickness of the shield was 1 cm and 1.5 cm, and the mold was printed using a 3D printer, and the patient customized shielding block (PCSB) was fabricated with a cerrobend alloy with a thickness of 1 cm and 1.5 cm. The dosimetry was performed by attaching an EBT3 film on the surface of the Alderson Rando phantom eyelid and measuring the dose of 6, 9, and 12 MeV electron beams on the film using four shielding methods. Shielding rates were 83.89%, 87.14%, 87.39% at 6, 9, and 12 MeV without shielding, 1 cm (92.04%, 87.48%, 86.49%), 1.5 cm (91.13%, 91.88% with PSCB), 92.66%) The shielding rate was measured as 1 cm (90.7%, 92.23%, 88.08%) and 1.5 cm (88.31%, 90.66%, 91.81%) when the shielding block and the patient-specific shield were used together. PCSB fabrication improves shielding efficiency over conventional shielding methods. Therefore, PSCB may be useful for clinical application.

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References

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