早期股骨头缺血性坏死的MR诊断

Diagnosis of MR of Early Avascular Necrosis of the Femoral Head

目的:研究MR对早期股骨头缺血坏死(ANFH)的诊断价值。材料与方法:13例双侧股骨头行X线及MRI检查,并对其影像学改变进行分期分析。结果:全部患者X线平片诊断为早期ANFH的13个部位,表现为骨疏松、骨硬化或囊状透亮区。MRI检查发现 18个部位,0期 1个,为股骨头外缘长 T1、长 T2信号影;1期4个,为带状长T1、长 T2信号影;2期13个,为股骨头内散在的斑点状、不规则的长T1、长T2信号,部分在异常信号周围可见长T1、短T2环状信号影,或表现为广泛的不规则的低、等、高混杂信号影。结论:MR可准确地显示早期ANFH病变,且敏感性及诊断价值高于X线平片等其他方法。

Purpose: To study the diagnostic value of MR of early avascular necrosis of the femoral head (ANFH). Materials and Methods: X-ray and MRI were conducted and grading was performed in bilateral femoral head of 13 cases. Results: The entire cases were diagnosed as early ANFH by X - ray film in 13 places. Those showed osteoporosis, osteosclerosis and cystic hyalomere. MRI displayed 18 places of early ANFH. Stage 0 displayed low or high signal intensity on T1 weighted and T2 weighted in the edge of the femoral head in 1 place. Stage 1 displayed the macular shape low or high signal intensity on T1 weighted and T2 weighted in 4 places. Stage 2 displayed the irregular shape low or equal or high signal, or thd flaky low signal and curve low signal on T1 weighted and T2 weighted in 13 places. Conclusion: MRI could exactly display early ANFH. Sensitivity and diagnostic value of MRI is superior to X - ray film and other methods.