Iwasaki Junichi, Sasho Takahisa, Nakagawa Koichi, Ogino Shuhei, Ochiai Nobuyasu, Moriya Hideshige
Department of Orthopaedic Surgery, Chiba University, Graduate School of Medicine, Chiba, Japan.
Clin Rheumatol. 2007 Oct;26(10):1705-8. doi: 10.1007/s10067-007-0578-1. Epub 2007 Feb 24.
Irregularly described contour of the femur and the tibia on magnetic resonance (MR) imaging is commonly seen in osteoarthritic (OA) knees. The aim of this study is to examine the relationship between irregularity of contour of medial femoral condyle (tentatively named I-index) and severity of OA. Twenty-six medial-type OA knees with a mean age of 63.8 were studied. All patients had undergone MR imaging to measure the I-index using image analysis software, and its relationship to Lysholm score was examined. The I-index negatively correlated with Lysholm score (r = -0.55, p < 0.01). The I-index for each Kellgren and Lawrence grade was significantly different. We have concluded that the I-index is a potent indicator to objectively describe the severity of OA especially for the advanced stage OA.
在骨关节炎（OA）膝关节的磁共振成像（MR）中，经常可以看到股骨和胫骨轮廓不规则。本研究的目的是探讨股骨内侧髁轮廓不规则（暂定名为I指数）与OA严重程度之间的关系。对26例平均年龄为63.8岁的内侧型OA膝关节进行了研究。所有患者均接受了MR成像，使用图像分析软件测量I指数，并检查其与Lysholm评分的关系。I指数与Lysholm评分呈负相关（r = -0.55，p < 0.01）。每个Kellgren和Lawrence分级的I指数有显著差异。我们得出结论，I指数是客观描述OA严重程度的有效指标，尤其是对于晚期OA。
