在轴向和冠状MRI测量时的隙宽度指数差异的比较
Jonathan McKeeman1, Ryan DeLeon1, Neil Jain1
1Department of Orthopaedic Surgery, St. Luke's University Health Network, Bethlehem, Pennsylvania, USA.
在ACL受伤的患者中,使用轴向MRI视图测量时,幅指数 (NWI) 较大. 这一发现对于在伤害风险评估中准确计算NWI至关重要.
科学领域:
- 整形外科
- 放射学
- 生物医学工程
背景情况:
- 前十字带 (ACL) 损伤与风险因素相关,如膝盖动的时刻,较小的隙宽度指数 (NWI),女性性别,部斜率增加和半径缺陷.
- NWI是一个已知的风险因素,通常使用冠状或轴心磁共振成像 (MRI) 切割来测量.
- 目前尚不清楚这些成像平面之间是否有NWI测量差异.
研究的目的:
- 在 ACL 损伤的患者中比较轴向与冠状动脉脉脉的测量.
- 建立基于成像平面的NWI计算的基准.
- 根据测量平面调查NWI的潜在差异.
主要方法:
- 一项横截面研究 (证据水平,3) 涉及64名患者 (≥14年) 在MRI上确认了ACL损伤.
- 整形医生使用标准和修改的MRI切割方法测量NWI.
- 统计分析包括测量比较的t测试和观察者之间的相关系数 (ICC).
主要成果:
- 在标准 (0. 29 vs 0. 25 , P < . 001) 和修改 (0. 27 vs 0. 23 , P < . 001) 方法中,轴心NWI测量明显大于冠状NWI测量.
- 轴平面上的隙宽度更大,而轴间距离在平面之间没有显著差异.
- 在轴向 (ICC: 0.97 修改, 0.99 标准) 和冠状 (ICC: 0.88 修改, 0.99 标准) NWI测量中观察到高的观察者间可靠性.
结论:
- 与冠状图相比,从轴向MRI视图中获得的NWI测量总是更大.
- 这种差异归因于轴平面中较宽的隙宽度测量,独立于隙间距离.
- 这些发现为NWI计算提供了基准,强调在ACL损伤研究中指定用于测量的成像平面的重要性.
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