摘要
目的研究快速自旋回波（ＦＳＥ）Ｔ２ＷＩ三维（３Ｄ）重建技术（以下简称３ＤＦＳＥＴ２ＷＩ）在显示内耳和内听道正常结构和病变中的应用价值。方法１０例健康志愿者和２０例听力下降患者行３ＤＦＳＥＴ２ＷＩ和二维（２Ｄ）ＦＳＥＴ２ＷＩ，比较分析２种技术显示正常结构和病变的优缺点；６例内淋巴囊扩大和１例Ｍｏｎｄｉｎｉ畸形患者同时行ＣＴ扫描，比较ＣＴ与３ＤＦＳＥＴ２ＷＩ的显示结果。结果３ＤＦＳＥＴ２ＷＩ清楚地显示正常膜迷路结构和内听道的小神经。３ＤＦＳＥＴ２ＷＩ显示９例患者共１６侧内淋巴囊扩大，并能从多个角度显示内淋巴囊扩大的全貌，而２ＤＦＳＥＴ２ＷＩ只能显示内淋巴囊的一部分而不是全貌。同时行ＣＴ扫描的６例内淋巴囊扩大患者在３ＤＦＳＥＴ２ＷＩ上显示１１侧内淋巴囊扩大，１侧不扩大，而ＣＴ则显示１２侧前庭导水管均扩大。ｌ例直径为４ｍｍ的小听神经瘤在２ＤＦＳＥＴ２ＷＩ上显示不清楚，而在３ＤＦＳＥＴ２ＷＩ上清楚显示。１例Ｍｏｎｄｉｎｉ畸形伴前庭、半规管发育不良，３ＤＦＳＥＴ２ＷＩ较２ＤＦＳＥＴ２ＷＩ和ＣＴ显示得更清楚。结论３ＤＦＳＥＴ２ＷＩ能清楚显示正常膜迷路和内听道正常神经以及小听神经瘤、内淋巴囊扩大和Ｍｏｎｄｉｎｉ畸形等内耳病?
Objective To investigate the advantage of threedimensional fast spinecho T2weighted image(3D FSE T2WI) in depicting normal structures and lesions of the inner ear Methods 3D FSE T2WI and 2D FSE T2WI were performed in 10 healthy volunteers and 20 cases with inner ear diseases Advantages and disadvantages of the two techniques were compared CT was performed in 6 cases with enlarged endolymphatic sac and 1 case of Mondini malformation Results 3D FSE T2WI enabled visualization of detailed anatomic structures Enlarged endolymphatic sacs were clearly revealed in 9 cases on 16 sides by 3D FSE T2WI, while only a part but not the whole of the enlarged endolymphatic sac could be shown on 2D FSE T2WI In 6 cases, 3D FSE T2WI displayed enlarged endolymphatic sac on 11 sides and normal on 1 side;however, CT revealed enlarged vestibular aqueduct on all 12 sides One case with small acoustic neuroma (only 4 mm in diameter) was clearly demonstrated on 3D FSE T2WI but not well shown on 2D FSE T2WI. One case with cochlear Mondini malformation associated with dysplasia of vestibule and semicircular canals was displayed more clearly on 3D FSE T2WI than on 2D FSE T2WI Conclusions 3D FSE T2WI can clearly display normal structures and lesions of the inner ear
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1999年第7期473-476,共4页
Chinese Journal of Radiology
关键词
迷路疾病
磁共振成像
评价研究
内耳疾病
Labyrinth diseasesMagnetic resonance imaging Evaluation studies
