摘要
目的 分析早期股骨头缺血坏死 (ANFH)的 MR表现 ,为早期诊断及有效处理提供可靠的影像学依据。方法 回顾性分析 32例 ANFH患者 (4 2个髋关节 )的 MR资料。结果 T1W 42个股骨头表现为前上区软骨下局灶性均匀或不均匀、边界清晰的呈楔形、节段形、带状或环状 T1W 低信号 38号 ,等信号 2例 ,混杂信号 2例 ;T2 W 高信号 32例 ,低信号 1例 ,等信号 7例 ,混杂信号 2例。 STIR序列上均为高信号 ,且范围大于 T2 W 。关节腔积液 17例 (4 0 .5 % ) ,“裂隙征”2 5例 (5 9.5 % )。结论 1广泛均匀的水肿是 ANFH极早期表现。 T1W1呈楔形、节段型、带状或环状低信号为ANFH最常见 MRI表现。 2“裂隙征”是 ANFH的一个重要 MRI征象。 3关节腔积液在 ANFH的诊断和鉴别诊断上有重要意义。 4早期所见极易与一过性骨质疏松症混淆 ,随访观察对鉴别有重要价值。
Objective To analyse the MR image feature of early avascular necrosis of femoral head(ANFH) in order to provide the reliable basis of its early diagnosis and early treatment.Methods The MR findings of 32 cases (42 hip joints )with early ANFH were analysed retrospectively.Results The MRI characteristics of ANFH in femoral head region were as follows:The lesions beneath the superanterior cartilage of femora head had the shape of wedges,segments,bands or rings with clear boundary.T1W1 showed focal low signal intensity in 38 of 42 femoral heads,iso-intensity in 2,and mix-intensity in 2.T2W1 showed high-intensity in 32 femoral heads,low-intensity in 1,iso-intensity in 7,and mix-intensity in 2.STIR sequence showed high-intensity in all lesions,and the lesions were larger than those in T1W1 SE.Other signs of ANFH in this series included hydrarthrosis(17 lesions,40.5%)and 'crack sign'(25 lesions,59.5%).Conclusion ①Diffuse edema in bone marrow is a very early sign of ANFH.②'Crack sign'is an important MR sign for the early diagnosis of ANFH.③Hydrarthrosis is of important value to the diagnosis and differential diagnosis of ANFH.④Follow-up is an effective method for differentiating early avascular necrosis from transient osteoprosis.
出处
《四川医学》
CAS
2000年第9期765-766,共2页
Sichuan Medical Journal
关键词
早期股骨头缺血坏死
磁共振成像
诊断
Hip Femoral head Avascular necrosis Magnetic resonance imaging Diagnosis
