股骨头坏死的核磁共振和CT影像学表现及检出阳性率差异研究

Nuclear magnetic resonance and computed tomography imaging findings of the femoral head necrosis and the difference of the positive rate

目的 分析股骨头坏死的核磁共振和CT影像学表现及检出阳性率差异,为临床诊断提供参考.方法 选取经随访或病理诊断为股骨头坏死的160例患者为研究对象,所有患者均行CT和核磁共振诊断,分析其影像学表现,并比较CT和核磁共振检出阳性率的差异.结果 CT诊断表现为骨硬化、囊性透亮,核磁共振诊断表现为T1W1和T2W1表现斑点状信号或者条状信号.核磁共振阳性检出率（97.5％）显著高于CT诊断（83.1％）（P＜0.05）,核磁共振早期诊断率显著高于CT诊断（P＜0.05）,中期和晚期诊断率差异未见统计学意义（P＞0.05）.结论 在股骨头坏死的诊断中,CT和核磁共振均是两种有效的诊断方法,但是核磁共振诊断检出率更高,对患者危害小,值得临床推广.

Objective To analyze the nuclear magnetic resonance （NMR） and computed tomography（CT） imaging findings of the femoral head necrosis and the difference of the positive rate and provide reference for clinical diagnosis.Methods A total of 160 cases of femoral head necrosis diagnosed by follow up or pathological diagnosis were selected as the study subjects,all the patients underwent CT and NMR diagnosis,the imaging findings were analyzed,and the differences of the CT and NMR detection positive rate were compared.Results CT diagnosis showed bone sclerosis,cystic lucency,NMR showed T1W1 and T2W1 manifestations of spot like signal or strip signal.NMR positive detection rate （97.5%） was significantly higher than CT （83.1%） （P 〈 0.05）,the early diagnosis rate of NMR was significantly higher than CT （P 〈 0.05）,the middle and late diagnosis rate has no significant difference （P〉 0.05）.Conclusions In the diagnosis of femoral head necrosis,CT and NMR are two effective diagnostic methods,but the NMR diagnosis rate is higher,the harm to patients is small,so it is worthy of promoting.