Assessment of the three-dimensional relationship of the ossific nuclei and cartilaginous anlagen in congenital clubfoot by 3-D MRI
Assessment of the three-dimensional relationship of the ossific nuclei and cartilaginous anlagen in congenital clubfoot by 3-D MRI
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DOI：
10.1016/j.orthres.2005.02.004
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发表时间：
2005-09-01
影响因子：
2.8
通讯作者：
Yoshikawa, H
中科院分区：
文献类型：
--
作者：
Itohara, T;Sugamoto, K;Yoshikawa, H
目的：X线测量是客观确定先天性马蹄内翻足畸形程度的常用方法。虽然X线片已被临床用于通过测量骨化核来估计跗骨的大小和位置，但尚不清楚这些关系在多大程度上实际反映在这些测量中。因此，我们使用了三维磁共振成像系统，可以更客观地估计尺寸和位置关系。材料和方法：我们评估了5例单侧先天性马蹄内翻足畸形。使用1.5 T磁体对双足进行磁共振成像。基于所得到的磁共振成像体数据，通过Marching Cubes方法重建三维表面骨模型。我们用这个模型进行了比较分析的体积和体积比的每个软骨原基和骨化核，距骨和跟骨的长度，和软骨原基内的骨化核的重心的位置。通过测量单侧马蹄内翻足患者的距骨和跟骨的骨核与软骨原基的关系，结果：畸形足患者的距骨体积减少20.1%，跟骨体积减少15.7%。距骨核体积缩小42.6%，跟骨骨核体积缩小12.1%。马蹄内翻足距骨的长度比正常短8.2%，跟骨的长度比正常短4.8%。结论：本文提出的评估技术被证明是有用的，在确定与马蹄内翻足相关的各种病理特征。(c)2005骨科研究学会。由爱思唯尔有限公司出版。保留所有权利。
Purpose: Radiographic measurement is the usual method used to objectively determine the extent of a congenital clubfoot deformity. Although radiographs have been used clinically to estimate the size and location of tarsal bones through measurements of the ossific nuclei, it is not clear to what extent these relationships are actually reflected in these measurements. So, we used a 3-D MRI system that could more objectively estimate sizes and positional relationships.Material and method: We evaluated 5 patients with unilateral congenital clubfoot deformity. Magnetic resonance imaging was performed of both feet using 1.5-T magnet. Based on the resulting magnetic resonance imaging volume data, a three-dimensional surface bone model was reconstructed by the Marching Cubes method. We used this model to perform a comparative analysis of the volume and volume ratio of each cartilaginous anlage and ossific nucleus, the length of the talus and the calcaneus, and the position of the center of gravity of ossific nuclei within the cartilaginous anlagen. We measured the relationship between the ossific nuclei and cartilaginous anlagen in the talus and calcaneus of patients with unilateral clubfoot deformity.Result: In clubfeet talus volume was reduced by 20.1% and calcaneal volume was reduced by 15.7%. Furthermore, the volume of the talar ossific nucleus was reduced by 42.6% and that of the calcaneal ossific nucleus was reduced by 12.1%. The length of the clubfoot talus was 8.2% shorter than normal, and that of the calcaneus was 4.8% shorter.Conclusion: The assessment technique presented herein was shown to be useful in ascertaining the various pathological characteristics associated with clubfoot. (c) 2005 Orthopaedic Research Society. Published by Elsevier Ltd. All rights reserved.