2024 · Skeletal Radiology
Skyline 영상의 빔 각도 ±5° 차이가 PFJ 지표를 바꾸며, 경골 앞쪽 경계가 촬영 기준이 될 수 있을까?
Sulcus·congruence·patellar tilt·lateral facet angle·bisect ratio는 빔 각도 사이에서 유의한 차이가 없었습니다(모두 P > 0.05).
원문 Fig. 3
그림 크게 보기같은 CT에서 빔을 중립, 위쪽 5°, 아래쪽 5°로 조정해 재구성한 skyline 영상입니다.
Sung Eun Kim, Sunghyun Hwang, Ji Han Lee, Geunwu Gimm, Hyuk-Soo Han, Byung Sun Choi, Du Hyun Ro. Minimal impact of beam projection angle deviations in skyline (Laurin) view and the efficacy of the anterior border of proximal tibia as a guiding landmark. Skeletal Radiology (2024). DOI: 10.1007/s00256-024-04619-1. © The Author(s) 2024
원문 캡션
Examples of beam projection angle deviations and corresponding digitally reconstructed skyline images from CT scans. A Neutral tilt, B 5° …
대상과 방법
그림을 읽는 순서
주요 결과
진료·수술에서 읽을 지점
해석의 제한
짧게 정리하면
이 연구가 확인한 것은 무엇인가요?
Sulcus·congruence·patellar tilt·lateral facet angle·bisect ratio는 빔 각도 사이에서 유의한 차이가 없었습니다(모두 P > 0.05).
개별 환자의 치료 결정에 바로 적용할 수 있나요?
검증한 촬영 조건과 ±5° 범위에 한정됩니다. 더 큰 각도 오차·심한 변형의 영향이나 임상 진단·수술 결과 개선을 직접 평가하지 않았습니다.
Keywords · 주제어
- Anterior border of proximal tibia
- Beam projection angle
- Deviation
- Laurin view
- Skyline view
- Tibia
- Tomography, X-Ray Computed
- Retrospective Studies
Abstract · 원문 초록
Sung Eun Kim, Sunghyun Hwang, Ji Han Lee, Geunwu Gimm, Hyuk-Soo Han, Byung Sun Choi, Du Hyun Ro. Minimal impact of beam projection angle deviations in skyline (Laurin) view and the efficacy of the anterior border of proximal tibia as a guiding landmark. Skeletal radiology. 2024;53(7):1399-1406. doi:10.1007/s00256-024-04619-1.
OBJECTIVE
Obtaining an optimal knee skyline view is challenging due to inaccuracies in beam projection angles (BPAs) and soft tissue obscuring bony landmarks. This study aimed to assess the impact of BPA deviations on patellofemoral index measurements and assessed the anterior border of the proximal tibia as an anatomic landmark for guiding BPAs.
MATERIALS AND METHODS
This retrospective study consisted of three parts. The first was a simulation study using 52 CT scans of knees with a 20° flexion contracture to replicate the skyline (Laurin) view. Digitally reconstructed radiographs simulated neutral, 5° downward, and 5° upward tilt BPAs. Five patellofemoral indices (sulcus angle, congruence angle, patellar tilt angle, lateral facet angle, and bisect ratio) were measured and compared. The second part was a proof of concept study on 162 knees to examine patellar indices differences across these BPAs. Lastly, the alignment of the anterior border of the proximal tibia with the BPA tangential to the patellar articular surface was tested from the CT scans.
RESULTS
No significant differences in patellofemoral indices were found across various BPAs in both the simulation and proof of concept studies (all p > 0.05). The angle between the anterior border of the proximal tibia and the patellar articular surface was 1.5 ± 5.3°, a statistically significant (p = 0.037) yet clinically acceptable deviation.
CONCLUSION
Patellofemoral indices in skyline view remained consistent regardless of BPA deviations. The anterior border of the proximal tibia proved to be an effective landmark for accurate beam projection.
© The Author(s) 2024
원래 논문
Minimal impact of beam projection angle deviations in skyline (Laurin) view and the efficacy of the anterior border of proximal tibia as a guiding landmark
Sung Eun Kim, Sunghyun Hwang, Ji Han Lee, Geunwu Gimm, Hyuk-Soo Han, Byung Sun Choi, Du Hyun Ro
Skeletal Radiology · 2024