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眶内视路病变的MRI扫描技术探讨 被引量:1

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摘要 目的探讨眶内视路病变患者的病因及MRI扫描序列的成像特点,制定合理的扫描方案。方法对628例疑似眶内视路病变患者使用西门子SONATA1.5T磁共振扫描仪扫描,扫描序列均采用T2WI,T1WI,短时反转恢复序列STIR,液体信号衰减反转恢复序列Darkfluid,增强T1WIFS序列,薄层小视野三维扫描。结果628例疑似眶内视路病变患者行SONA.TA1.5T磁共振扫描检查,共检出病变总阳性率为76.9%(483/628),其中球内病变78例,占16.1%,眼眶病变及视路外压性病变272例,占56.3%,视神经炎133例,占27.5%。Darkfluid序列对于显示球内病变阳性率[88.5%(69/78)]显著高于传统T1WI,T2WI[20.5%(16/78)、34.6%(27/78),X2=47.78,72.61,P〈0.01];T1WIFS对于眼眶病变及视路外压性病变显示优于常规T1WI,T2WI[89.3%(243/272)vs32.7%(89/272)、60.7%(165/272),√:183.30,59.65,P〈0.01];STIR序列显示视神经炎检出率[73.7%(98/133)]均高于T1WI、T2WI及T1WIFS[27.8%(37/133)、44.4%(59/133)、59.4%(79/133),)(2=55.97,23.64,6.10,P〈0.01]。结论根据引起眶内视路病变的病因采用不同的MRI序列能很好的发现引起视力下降的各种眶内视路病变。Darkfluid(水抑制)能更好显示眼球内占位性病变;增强T1WIFS序列对于眼眶病变及视路外压性病变显示优于传统T2WI,T1WI序列;冠状面STIR序列显示视神经炎最佳。
出处 《中国医师杂志》 CAS 2013年第7期972-973,共2页 Journal of Chinese Physician
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