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방사선 투과 각도에 따른 족부 방사선 지표의 변화: Phantom Foot을 이용한 연구

Change of Radiologic Index of Foot according to Radiation Projection Angle: A Study Using Phantom Foot

  • 김어진 (서울대학교병원 정형외과) ;
  • 서상교 (서울아산병원 정형외과) ;
  • 이동연 (서울대학교병원 정형외과)
  • Kim, Eo Jin (Department of Orthopedic Surgery, Seoul National University Hospital) ;
  • Seo, Sang Gyo (Department of Orthopedic Surgery, Asan Medical Center) ;
  • Lee, Dong Yeon (Department of Orthopedic Surgery, Seoul National University Hospital)
  • 투고 : 2015.10.21
  • 심사 : 2015.11.06
  • 발행 : 2015.12.15

초록

Purpose: The purpose of this study is to analyze the measurement differences of simple radiographs according to radiation projection angle using a phantom and to propose methods for objective analysis of simple radiographs. Materials and Methods: We took simple radiographs with different projection angles using a C-arm image intensifier and measured five parameters of the foot on the simple radiographic images. Five parameters include lateral tibiocalcaneal angle, lateral talocalcaneal angle, naviculocuboid overlap, lateral talo-first metatarsal angle, and lateral calcaneo-first metatarsal angle. Intraobserver and interobserver reliability were verified, and then intraclass correlations of parameters were analyzed. Results: Radiographic parameters of the foot showed high intraobserver and interobserver reliability. Lateral tibiocalcaneal angle has a strong negative linear relationship with rotation and a moderate negative linear relationship with tilt. Lateral talocalcaneal angle has a moderate positive linear relationship with rotation and a strong positive linear relationship with tilt. Naviculocuboid overlap has a strong positive linear relationship with rotation and a moderate positive linear relationship with tilt. Lateral talo-first metatarsal angle does not have a linear relationship with rotation and a moderate negative linear relationship with tilt. Lateral calcaneo-first metatarsal angle has a moderate positive linear relationship with rotation and tilt. Conclusion: More precise evaluation of the foot with a simple radiograph can be performed by understanding the changes of radiographic parameters according to radiation projection angle.

키워드

참고문헌

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