Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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A Study on the Fabrication of bone Model X-ray Phantom Using CT Data and 3D Printing Technology

CT 데이터와 3D 프린팅 기술을 이용한 뼈 모형 X선 팬텀 제작에 관한 연구

  • Yun, Myeong Seong (Department of Radiological Science, Eulji University) ;
  • Han, Dong-Kyoon (Department of Radiological Science, Eulji University) ;
  • Kim, Yeon-Min (Department of Radiological Science, Wonkwang health science University) ;
  • Yoon, Joon (Department of Radiological Science, Dongnam health University)
  • 윤명성 (을지대학교 방사선학과) ;
  • 한동균 (을지대학교 방사선학과) ;
  • 김연민 (원광보건대학교 방사선과) ;
  • 윤준 (동남보건대학교 방사선과)
  • Received : 2017.11.11
  • Accepted : 2017.12.31
  • Published : 2018.12.30
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Abstract

A 3-dimensional (D) printer is a device capable of outputting a three-dimensional solid object based on data modeled in a computer. These features are utilized in the bone model X - ray phantom production etc using CT data by fusing with the radiation science field. A bone model phantom was made using data obtained by CT scan of an existing Pelvis phantom, using PLA, Wood, XT-CF20, Glow fill, Steel filaments which are materials of Fused Filament Fabrication (FFF) 3D printer.Measure Hounsfield Unit (HU) with images obtained by CT scan of the existing Pelvis phantom and five material phantoms made with 3D printer under the same conditions,SI and SNR were measured using a diagnostic X-ray generator, and each phantom was compared and analyzed.As a result, the X - ray phantom in the X - ray examination condition of the limb was found to be most suitable for the glow fill filament.The characteristics of the filament can be known to the base of this research and the practicality of X - ray phantom fabrication was confirmed.

3-dimensional(D) 프린터는 컴퓨터로 모델링 한 데이터를 바탕으로 3차원의 입체 물체를 출력할 수 있는 장비이다. 이러한 특징을 방사선과학 분야와 융합하여, CT 데이터를 이용한 뼈 모형 X선 팬텀제작 등에 활용되고 있다. 본 연구는 기존의 Pelvis팬텀을 CT 스캔하고 얻어진 데이터로 Fused Filament Fabrication(FFF) 3D 프린터의 소재인 PLA, Wood, XT-CF20, Glow fill, Steel 필라멘트를 이용하여, 뼈 모형 팬텀을 제작하였다. 기존의 Pelvis 팬텀과 3D 프린터로 제작된 5가지 재질의 팬텀을 동일한 조건으로 CT 스캔 하고 얻어진 영상에서 Hounsfield Unit(HU)을 측정하였으며, 진단용X선 발생장치를 이용하여 SI, SNR을 측정하여 각 팬텀을 비교 분석하였다. 그 결과 사지 X선 검사 조건 내에서 X선 팬텀은 glow fill 필라멘트가 가장 적합하다는 것을 알 수 있었다. 본 연구의 기반으로 필라멘트의 특성들을 알 수 있었으며, X선 팬텀 제작에 대한 실용성을 확인하였다.

Keywords

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Fig. 1. Experimental equipment used for phantom production.

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Fig. 2. 3D Printing production process.

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Fig. 3. CT number ROI setup (a) femur head, (b) femur neck, (c) Femur body

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Fig. 4. X-ray imaging system and phantom

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Fig. 5. X-ray imaging SI and SNR setup

Table 1. Set-up of 3D printer

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Table 2. The result of CT number measurement for Pelvis Phantom and 3D Printing Phantom

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Table 3. The result of SI measurement for Pelvis Phantom and 3D Printing Phantom.

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Table 4. The result of SNR measurement for Pelvis Phantom and 3D Printing Phantom.

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