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파노라마방사선사진에서 환자의 머리 위치가 하악 수직, 수평 확대율에 미치는 영향: 상하 및 좌우회전

Effect of head positioning on the vertical and horizontal magnification in panoramic radiographs: rotation along the sagittal and transverse plane

  • 김용건 (경북대학교 치의학전문대학원, 치주과학교실) ;
  • 변진석 (경북대학교 치의학전문대학원, 구강내과학교실) ;
  • 안서영 (경북대학교 치의학전문대학원, 구강악안면방사선학교실)
  • Kim, Yong-Gun (Department of Periodontology, School of Dentistry, Kyungpook National University) ;
  • Byun, Jin-Seok (Department of Oral medicine, School of Dentistry, Kyungpook National University) ;
  • An, Seo-Young (Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyungpook National University)
  • 투고 : 2013.12.10
  • 심사 : 2014.03.07
  • 발행 : 2014.03.31

초록

목적: 이 연구는 파노라마방사선사진 촬영 시 환자의 머리 위치가 상방, 하방, 좌측 및 우측으로 회전됨에 따른 수평 및 수직 확대율의 변화를 비교 평가하는 것이었다. 연구 재료 및 방법: 직경 4 mm인 금속구 5개를 건조 두개골의 하악 전치부(2개)와 우측 대구치부(3개)의 치조골 상방에 위치시켰다. 상하 및 좌우 회전량을 조절할 수 있는 두개골 고정장치에 건조 두개골을 고정시킨 후, 기준 위치와 회전된 위치에서 파노라마방사선사진을 쵤영하였다. 결과: 기준 위치에서 평균 수평 확대율은 $1.22{\pm}0.01-1.44{\pm}0.01$이었고, 평균 수직 확대율은 $1.29{\pm}0.00-1.35{\pm}0.02$였다. 전치부와 구치부 비교시 수평 확대율은 전치부에서 $1.24{\pm}0.02-1.31{\pm}0.03$, 구치부에서 $1.40{\pm}0.03-1.33{\pm}0.02$로 유의한 차이가 있었고(P < 0.05), 수직 확대율은 차이가 없었다. 위치 변화에 따른 수평 확대율은 $0.88{\pm}0.03-3.73{\pm}0.16$으로 기준 위치와 비교 시 통계적으로 유의한 차이를 보인 반면 (P < 0.05), 수직 확대율은 $1.24{\pm}0.01-1.37{\pm}0.02$로 차이가 없었다. 결론: 회전된 머리위치에서 파노라마방사선사진 촬영 시 수평 확대율의 변화가 크다.

Purpose: The purpose of this study was to investigate the effect of head position changes on vertical and horizontal magnification in dental panoramic radiographs. Materials and Methods: Five 4 mm metal balls were placed above alveolar crest of dry skull considering extraction socket and dental arch. Panoramic radiographs were taken by OP-100D (Instrumentarium Imaging Co., Tuusula, Finland) at proper and rotated head position along the sagittal and transverse axis at 3 - $20^{\circ}$ upwardly, downwardly, to the left and to the right rotation. Images were stored in DICOM files and were measured by ruler equipped within INFINITT PACS software. Results: The mean horizontal magnification was $1.22{\pm}0.01-1.44{\pm}0.01$ and mean vertical magnification was $1.29{\pm}0.00-1.35{\pm}0.02$ at standard head position. There was statistical significance of horizontal magnification between the anterior ($1.24{\pm}0.02-1.31{\pm}0.03$) and the posterior area ($1.40{\pm}0.03-1.33{\pm}0.02$) (P < 0.05). Vertical magnification resulted in less variation ($1.24{\pm}0.01-1.37{\pm}0.02$) than horizontal magnification ($0.88{\pm}0.03-3.73{\pm}0.16$) according to the rotation. There was statistical significant difference on horizontal magnification (P < 0.05). Conclusion: In rotated head position, the horizontal magnification should be considered because these can cause distortion on panoramic radiographs.

키워드

참고문헌

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