CT在一过性骨质疏松症股骨头软骨下骨损伤的诊断价值

目的:适龄生育妇女往往在围产期出现双髋关节的持续疼痛不适,诊断一过性骨质疏松症(TOH)股骨头软骨下骨损伤的标准依据:典型的特殊症状,X线及MRI。验证依据股骨头冠状位多平面计算机成像技术判断软骨下骨小梁是否损伤的准确性。方法:在股骨头软骨下骨选择一个相对固定的观察点,按时间顺序行0、4、12、20、48周时间点的股骨头的CT动态冠状位检查。结果:大约疼痛发病4周以后,骨质的密度会有所下降,表现为压力骨小梁的不规则变化,吸收;12周的时候,观察区域的单个骨小梁会增厚;20周的时候观察,骨的高密度影像恢复,观察区的硬化的骨小梁消失;1年以后,软骨下骨小梁几乎完全恢复。

Objective：Woman presented with both hip pain that started sequentially during the peripartum period. Diagnosis of transient osteoporosis of the hip （TOH） was made based on typical findings of plain radiographs and magnetic resonance images. Methods ： The subchondral trabeculae of the femoral head were evaluated on serially taken coronal multiplanar reformation computerized tornogram images. Results： At 4 weeks after pain onset, marked decrease in the sclerotic density with irregular discontinuation was observed in the primary compression trabeculae. At 12 weeks, a focal area of irregular thickening of trabeculae was observed. At 20 weeks, sclerotic density of trabeculae recovered markedly and the focal area of irregular trabecular thickening disappeared. At 1 yr, subchondral trabeculae recovered almost completely.