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요근과 척추주위 등 근육 부종의 자기공명영상 기반 등급화: 요추 횡돌기 골절 진단에 도움이 되는가?

Magnetic Resonance-Based Grading of Psoas and Paraspinal Muscle Edema: Is It Helpful in Diagnosing Lumbar Transverse Process Fractures?

  • 정현석 (강동경희대학교병원 영상의학과) ;
  • 진욱 (강동경희대학교병원 영상의학과) ;
  • 박용성 (강동경희대학교병원 영상의학과) ;
  • 윤성종 (강동경희대학교병원 영상의학과) ;
  • 박소영 (강동경희대학교병원 영상의학과) ;
  • 박지선 (경희대학교 의과대학 영상의학교실) ;
  • 유경남 (경희대학교 의과대학 영상의학교실)
  • Jeong, Hyunseok (Department of Radiology, Kyung Hee University Hospital at Gangdong) ;
  • Jin, Wook (Department of Radiology, Kyung Hee University Hospital at Gangdong) ;
  • Park, Yong Sung (Department of Radiology, Kyung Hee University Hospital at Gangdong) ;
  • Yun, Seong Jong (Department of Radiology, Kyung Hee University Hospital at Gangdong) ;
  • Park, So Young (Department of Radiology, Kyung Hee University Hospital at Gangdong) ;
  • Park, Ji Seon (Department of Radiology, College of Medicine, Kyung Hee University) ;
  • Ryu, Kyung Nam (Department of Radiology, College of Medicine, Kyung Hee University)
  • 투고 : 2018.01.09
  • 심사 : 2018.05.19
  • 발행 : 2018.10.01

초록

목적: 요추 횡돌기 골절의 진단에서 축 방향 T2 강조 자기공명영상에서 요근과 척추 주위 등 근육 부종 등급화의 신뢰성을 알아보고자 하였다. 대상과 방법: 2명의 영상의학과 의사가 56명 환자(평균연령: 56.1세, 연령범위: 17-87세, 남자:여자 = 28명:28명)의 요추 자기공명영상을 후향적으로 분석하였다. 디스크 레벨에서 축 방향 T2 강조영상를 기반으로 척추 주위의 근육은 4구역으로 분류하고 근육 부종(축 방향 T2 강조영상에의 신호 강도 증가) 등급을 매겼다. 결과: 56명의 환자, 총 486개의 횡돌기(골절: 24건, 정상: 462건)가 평가되었다. 근육 부종 등급은 횡돌기 골절과 중등도의 상관관계를 보여주었다(${\rho}=0.466$). Receiver operating characteristic curve 분석에서 근육 부종 등급 총점의 cut-off 값을 2.50으로 정했을 때 횡돌기 골절 진단의 민감도는 72.7%, 특이도는 90.7%였다. 근육 부종 등급이 높을수록 횡돌기 골절의 가능성이 유의하게 높았다[양면(전체): 교차비 1.704 (95% 신뢰 구간 1.410-2.060)]. 결론: 요추 자기공명영상 축 방향 T2 강조영상에서 요근과 등 주위 근육 부종의 등급화는 횡돌기 골절을 놓치지 않는데 도움이 된다.

Purpose: To determine the reliability of edema grading of the psoas and paraspinal muscles on axial T2-weighted magnetic resonance (MR) image (T2WI) for the detection of lumbar transverse process (TP) fractures. Materials and Methods: A retrospective review of lumbar spine MR images of 56 patients (mean age = 56.1 years, age range = 17-87 years, male:female = 28:28) was conducted by 2 radiologists. Based on the axial T2WI at the disc level, the paraspinal muscles were classified into 4 compartments and muscle edema (increased signal intensity on axial T2WI) grading performed for each quadrant. Results: A total of 486 TPs (with fracture: 24, without fracture: 462) of 56 patients were evaluated. Muscle edema grade showed moderate correlation with the presence of TP fracture (${\rho}=0.466$). When the total score of muscle edema was 2.50, the receiver operating characteristic curve showed a sensitivity of 72.7% and a specificity of 90.7%. A higher edema grade had a significantly higher probability of concomitant TP fracture [any sided (total): odds ratio = 1.704 (95% confidence interval = 1.410-2.060)]. Conclusion: Edema grading of the psoas and paraspinal muscles on axial T2WI of lumbar spine can be helpful in the detection of TP fracture.

키워드

참고문헌

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