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首页> 外文期刊>The journal of knee surgery >Patellar Height Measurements on Radiograph and Magnetic Resonance Imaging in Patellar Instability and Control Patients
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Patellar Height Measurements on Radiograph and Magnetic Resonance Imaging in Patellar Instability and Control Patients

机译：髌骨毫不稳定性和控制患者X型射线照相和磁共振成像的髌骨高度测量

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摘要

Insall-Salvati (IS) ratio, modified IS ratio (mIS), Caton-Deschamps (CD) index, and Blackburne-Peel (BP) index are patellar height measurements commonly made on lateral radiographs (XRs) in patients with patellofemoral instability. More recently, magnetic resonance imaging (MRI) has been used as an additional imagingmodality to measure patellar height. However, different imaging modalities have not been previously compared for all of these measurements. First, to compare the patellar height measurements of IS, mIS, CD, and BP on XR and MRI in first-time lateral patellar dislocation (LPD) patients and a control population and, second, to evaluate for the effect of sex and skeletal maturity. All first-time LPD patients with both MRI and XR of the knee within 6 weeks of injury from 2008 to 2012 were included in the LPD group (n = 112). Patients without patellofemoral instability who underwent both MRI and XR of the knee served as controls (n = 129). Two independent observers measured patellar height. Mean values were compared among the radiographic modalities, sex, and skeletal maturity status. Interobserver reliability was assessed using intraclass correlation coefficients (ICCs). Patellar height in the LPD group measured greater on MRI than on XR for all four patellar height ratios (IS: 0.11; mIS: 0.07; CD: 0.18; BP: 0.08). In controls, MRI also demonstrated higher readings than XR on two indices (CD: 0.17; BP: 0.16). Skeletally immature patients measured higher than skeletally mature patients in the majority of the measurements by 0.12 to 0.20 on MRI and XR; the majority of the measurements showed no sex differences. ICC was excellent for IS on both MRI (ICC = 0.830) and XR (ICC 0.849) and for CD on XR (ICC = 0.786). Patellar height measured greater on MRI than XR by approximately 0.10 across four patellar height measurement indices. Skeletally immature patients measured higher than skeletally mature on both MRI and XR, but sex did not have an effect. This is a retrospective cohort study and its level of evidence is 3.
机译：InsAll-Salvati（IS）的比率，改性为比例（MIS），Caton-Deschamps（CD）指数和Blackburne-Peel（BP）指数是髌寡迷不稳定性患者横向射线照片（XRS）上的髌骨高度测量。最近，磁共振成像（MRI）已被用作额外的成像性以测量髌骨高度。然而，对所有这些测量相比，先前尚未先前未进行不同的成像模式。首先，将髌骨高度测量与XR和MRI的髌骨高度测量进行比较，首次髌骨脱位（LPD）患者和对照种群，第二，评估性别和骨骼成熟的效果。在LPD组中包含6周内膝关节MRI和XR的所有MRI和XR的患者均包含在LPD组（N = 112）中。没有PatelloFemoral不稳定性的患者，膝关节的MRI和XR担任控制（n = 129）。两个独立观察者测量髌骨高度。比较射线照相型号，性别和骨骼成熟地位的平均值。使用Intraclass相关系数（ICC）评估Interobserver可靠性。 LPD组中的髌骨高于MRI测量比所有四个髌骨高度比的XR更大（是：0.11; MIS：0.07; CD：0.18; BP：0.08）。在对照中，MRI还在两个指数上显示比XR更高的读数（CD：0.17; BP：0.16）。骨骼未成熟的患者比MRI和XR的大部分测量比骨骼成熟患者高于骨骼成熟患者;大多数测量显示出没有性差异。 ICC适用于MRI（ICC = 0.830）和XR（ICC 0.849）和XR上的CD（ICC = 0.786）。在四个髌骨高度测量指标上，MRI比XR测量大约0.10的髌骨高度。骨骼未成熟的患者在MRI和XR上测量高于骨骼成熟，但性没有效果。这是回顾性队列研究，其证据水平为3。

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