Nakanishi K, Tanaka H, Nishii T, Masuhara K, Narumi Y, Nakamura H
Department of Radiology, Osaka Seamens Insurance Hospital, Japan.
Acta Radiol. 1999 Jan;40(1):60-3. doi: 10.1080/02841859909174404.
The purpose was to evaluate the articular cartilage of the hip joint with MR during traction and compare the findings with the resected specimen or arthroscopic findings.
Eight healthy volunteers, 5 patients with osteonecrosis, 5 with acetabular dysplasia, and 5 with advanced osteoarthrosis underwent MR imaging to evaluate the articular cartilage of the hip joint. Coronal fat-suppressed 3D spoiled gradient-echo (SPGR) images were obtained during traction. Identical imaging was performed of all the resected femoral heads of the osteonecrosis and advanced osteoarthrosis patients, and was correlated with the macroscopic pathological findings.
The traction was effective and the femoral articular cartilage was clearly identified in all 8 control subjects, and in all cases of osteonecrosis and acetabular dysplasia. In 4 cases of osteonecrosis, chondral fracture was identified in the boundary between the necrosis and the normal area. In all cases of advanced osteoarthrosis, cartilage was identified only at the medial side. The MR images of osteonecrosis and advanced osteoarthrosis corresponded well with the MR images of the resected femoral heads and the macroscopic findings.
Fat suppressed 3D-SPGR during continuous leg traction was useful in detecting cartilage abnormalities.
本研究旨在通过磁共振成像（MR）评估髋关节在牵引状态下的关节软骨，并将结果与切除标本或关节镜检查结果进行比较。
8名健康志愿者、5名股骨头坏死患者、5名髋臼发育不良患者和5名晚期骨关节炎患者接受了MR成像，以评估髋关节的关节软骨。在牵引过程中获取冠状位脂肪抑制三维扰相梯度回波（SPGR）图像。对所有股骨头坏死和晚期骨关节炎患者切除的股骨头进行相同的成像，并与宏观病理结果进行对比。
牵引有效，在所有8名对照受试者以及所有股骨头坏死和髋臼发育不良病例中，均可清晰识别股骨关节软骨。在4例股骨头坏死病例中，在坏死区与正常区域的边界处发现软骨骨折。在所有晚期骨关节炎病例中，仅在内侧发现软骨。股骨头坏死和晚期骨关节炎的MR图像与切除股骨头的MR图像及宏观检查结果吻合良好。
持续腿部牵引期间的脂肪抑制三维SPGR成像有助于检测软骨异常。
