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2020 Vol.24, Issue 2

Original Article

Correction of Movement Error in Parallel-beam CT for Dental Implantology

치과 임플란트 치료를 위한 평행광 CT의 움직임 에러 수정

Seokhwan Yoon1
,
Seong-Kyun Kim2*
,
Seong-Joo Heo2
,
Jai-Young Koak2
,
Jae-Hong Lim3
,
SeungJoon Noh4
,
Kyungtaek Jun5
윤 석환1
,
김 성균2*
,
허 성주2
,
곽 재영2
,
임 재홍3
,
노 승준4
,
전 경택5
1PhD, Department of Prosthodontics & Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University
2Professor, Department of Prosthodontics & Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University
3Researcher, Pohang Accelerator Laboratory, Pohang University of Science and Technology KR
4Researcher, Weill Cornell Medicine CLC Genomics Resources Core Facility
5PhD, Department of Applied Mathematics and Statistics, Stony Brook University
1서울대학교 치의학대학원 치과보철학교실 및 치학연구소 박사과정
2서울대학교 치의학대학원 치과보철학교실 및 치학연구소 교수
3포항공과대학교 포항가속기연구소 연구원
4웨일코넬의과대학원 유전자분석연구소 연구원
5스토니브룩대학교 응용수학통계학과 박사과정
*Corresponding Author
30 June 2020. pp. 51-61
PDF XML Citation
Abstract

Purpose: The purpose of this study is to correct the errors that may occur because of the patients' movement during the CT scanning, and thus, to obtain more precise CT images, additionally to investigate the possible use of parallel Beam CT in the dental treatment.

Materials and Methods: Applying the Radon transform using phantom image, the same image and the sinogram with the ones by CT scanning were obtained. The possible movement errors that patients may cause during the CT scan were given to the data images. The maximum width of errors was designed to reach 1 mm. The fixed point was identified in the errored CT projected images, and each projected image with errors was adjusted so that each fixed point is placed on the same axial plane, then the fixed point was traced on the sinogram. On the traced trajectory of the fixed point, the part deviated from the sinusoidal curve was modified using the Virtual Alignment Method.

Results: The quality of reconstructed image was remarkably degraded when the movement errors were given. The movement errors were corrected by moving the fixed point to the center of sinogram and this relocation of fixed point did not cause any distortion of image or change of size.

Conclusion: The movement errors during CT scanning were corrected using the fixed point inside of the image. The more precise CT images obtained through this method are expected to be of extensive application in the area of dental implantology.

Keywords
Fixed point
Parallel Beam CT
Phantom image
Radon transform
Sinogram
Virtual Alignment Method
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Information
  • Publisher :The Korean Academy of Oral & Maxillofacial Implantology
  • Publisher(Ko) :대한구강악안면임플란트학회
  • Journal Title :Implantology
  • Journal Title(Ko) :대한구강악안면임플란트학회지
  • Volume : 24
  • No :2
  • Pages :51-61
  • Received Date : 2020-04-03
  • Revised Date : 2020-04-22
  • Accepted Date : 2020-04-27
  • DOI :https://doi.org/10.32542/implantology.202006
Journal Informaiton Journal of implantology and applied sciences Journal of implantology and applied sciences
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