Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지

The effect of mandibular position and gantry angle on the evaluation of implant site with implant CT

임플랜트 전산화단층사진에서 하악의 위치와 gantry각의 변화가 임플랜트 매식로 평가에 미치는 영향에 관한 연구

  • Lee Sul-Mi (Department of Oral and Maxillofacial Radiology, Dental Research Institute, , College of Dentistry, Seoul National University) ;
  • An Chang-Hyeon (Department of Oral and Maxillofacial Radiology, Dental Research Institute, , College of Dentistry, Seoul National University) ;
  • Choi Hang-Moon (Department of Oral and Maxillofacial Radiology, College of Dentistry, Kangnung National University) ;
  • Heo Min-Suk (Department of Oral and Maxillofacial Radiology, Dental Research Institute, , College of Dentistry, Seoul National University) ;
  • Lee Sam-Sun (Department of Oral and Maxillofacial Radiology, Dental Research Institute & BK21, College of Dentistry, Seoul National University) ;
  • Choi Soon-Chul (Department of Oral and Maxillofacial Radiology, Dental Research Institute & BK21, College of Dentistry, Seoul National University) ;
  • Park Tae-Won (Department of Oral and Maxillofacial Radiology, Dental Research Institute, , College of Dentistry, Seoul National University)
  • 이설미 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소) ;
  • 안창현 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소) ;
  • 최항문 (강릉대학교 치과대학 구강악안면방사선학교실) ;
  • 허민석 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소) ;
  • 이삼선 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소 및 두뇌한국 21) ;
  • 최순철 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소 및 두뇌한국 21) ;
  • 박태원 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소)
  • Published : 2002.03.01
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Abstract

Purpose: The altered gantry angle during scanning for some multiplanar reconstruction CT program (CT/MPR) may cause distortion of the image. The aim of this study was to ascertain whether there is a image distortion in a reformatted image when the gantry and the object are equally inclined using ToothPix and DentaScan program. Materials and Methods: A resin block model with four cylindrical holes and a human dry mandible were used. Two MPR software packages, ToothPix and DentaScan program, were used for reformatted panoramic images. The block and the gantry were equally inclined at 0°, 15°, and 30°. Results: With ToothPix program, a resin block model with empty holes and a dry mandible showed inclined images in the reformatted panoramic image. Increasing the gantry angle, the depth and inclination of the holes were increased in the reformatted central panoramic images. However, a resin block model with gutta perch a in its holes and a dry mandible with a wire in its mandibular canal didn't show image distortion. With DentaScan program, image distortion was not seen in any situation. Conclusion: ToothPix program may distort the reformatted image when the gantry angle is not at zero degrees. However, with DentaScan program, the patient may be positioned comfortably and the gantry can be adjusted to the patient positioning.

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