Imaging Science in Dentistry

  • 제32권1호
  • /
  • Pages.27-33
  • /
  • 2002
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  • 2233-7822(pISSN)
  • /
  • 2233-7830(eISSN)
대한영상치의학회 (Korean Academy of Oral and Maxillofacial Radiology)
권호 표지

전산화단층 촬영상의 임계치가 3차원 의학모델 정확도에 미치는 영향에 대한 연구

Influence of threshold value of computed tomography on the accuracy of 3-dimensional medical model

  • 이병도 (원광대학교 치과대학 구강악안면방사선학교실, 원광 치의학연구소) ;
  • 이완 (원광대학교 치과대학 구강악안면방사선학교실, 원광 치의학연구소)
  • Lee Byeong-Do (Dept of Oral & Maxillofacial Radiology, School of Dentistry, Wonkwang University Wonkwang Dental Research Institute) ;
  • Lee Wan (Dept of Oral & Maxillofacial Radiology, School of Dentistry, Wonkwang University Wonkwang Dental Research Institute)
  • 발행 : 2002.03.01
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초록

Purpose: To evaluate the influence of threshold value of computed tomography on the accuracy of rapid prototyping (RP) medical model Material and Methods : CT datas of a human dry skull were transferred from CT scanner via compact disk to a personal computer (PC). 3-dimensional image reconstruction on PC by V-works/sup TM/ 3.0 (CyberMed. Inc.) software and RP models fabrication were followed. 2-RP models were produced by threshold value of 500 and 800 selected in surface rendering process. Linear measurements between arbitrary 12 anatomical landmarks on dry skull, 3-D image model, and 2-RP models were done and compared. Thus, the accuracy of 500 RP and 800RP models was respectively evaluated. Results: There was mean difference (% difference) in absolute value of 2.27 mm (2.73%) between linear measurements of dry skull and 500 RP model. There was mean difference (% difference) in absolute value of 1.94 mm (2.52%) between linear measurements of dry skull and 800 RP model. Conclusion: Slight difference of threshold value in rendering process of 3-D modelling made a influence on the accuracy of RP medical model.

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