股骨头软骨下不全骨折的对比增强磁共振成像：与股骨头坏死的初步比较
Contrast-enhanced MR imaging of subchondral insufficiency fracture of the femoral head: a preliminary comparison with that of osteonecrosis of the femoral head.
作者信息
Miyanishi Keita, Hara Toshihiko, Kaminomachi Shigekazu, Maeda Hiroki, Watanabe Hideyuki, Torisu Takehiko
机构信息
Department of Orthopaedic Surgery, Kyushu Rosai Hospital, 1-3-1 Kuzuharatakamatsu, Kokuraminami-ku, Kitakyushu 800-0296, Japan.
出版信息
Arch Orthop Trauma Surg. 2009 May;129(5):583-9. doi: 10.1007/s00402-008-0642-6. Epub 2008 Apr 30.
INTRODUCTION
Subchondral insufficiency fracture of the femoral head (SIF) may be confused with osteonecrosis of the femoral head (ON) due to clinical and imaging similarities.
MATERIALS AND METHODS
Contrast-enhanced MR images in patients with SIF (ten hips in ten patients) were retrospectively reviewed and compared with those from patients with ON (ten hips in six patients).
RESULTS
Low-signal intensity bands on T1-weighted images were present within the femoral head in all hips examined. The segment proximal to the band was contrast-enhanced following IV gadolinium administration in nine of ten hips (90%) with SIF and in none of the 10 hips with ON.
CONCLUSION
These results suggest that the presence of contrast enhancement in the segment proximal to the low-signal intensity band in the femoral head may serve as a supplemental diagnostic measure for the differentiation of SIF from ON.
引言
由于临床和影像学表现相似，股骨头软骨下不全骨折（SIF）可能会与股骨头坏死（ON）相混淆。
材料与方法
回顾性分析SIF患者（10例患者的10个髋关节）的对比增强磁共振成像，并与ON患者（6例患者的10个髋关节）的成像进行比较。
结果
所有检查的髋关节中，股骨头在T1加权图像上均出现低信号带。在10例SIF患者的10个髋关节中有9个（90%）在静脉注射钆后，低信号带近端的节段出现对比增强，而10例ON患者的髋关节均未出现。
结论
这些结果表明，股骨头低信号带近端节段出现对比增强可作为区分SIF与ON的补充诊断方法。
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