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作者采用单盲法回顾性评价44例经手术治疗的小儿难治性癫痫者的MRI及其病理特点,并探讨两者的相关性。本组包括男22例,女22例,年龄2～18岁,平均12岁。MRI应用1.5T,行横断面和矢状面成像,条件为层厚5mm,TE20～90msec,TR2000～2500msec。冠状面T1加权象TR/TE=500～800/10～20msec,层厚3～5mm,矩阵256×192;T2加权象TR/TE=2500/20～90msec,部分患者行反转恢复序列(TR/TE1500/20～30msec、IR150～600),MRI显示异常病变时行G—DTPA增强。依据下列标准确定异常病变的是否存在:(1)局灶或弥漫性脑叶萎缩(如颞叶萎缩);(2)局灶或弥漫性脑室扩大;(3)结构性萎缩(海马萎缩);(4)
The authors retrospectively assessed the MRI and pathological features of 44 surgically-treated children with refractory epilepsy by single-blind method and explored the correlation between the two. This group includes 22 males and 22 females, aged 2 to 18 years, mean 12 years old. MRI applications 1.5T, transverse and sagittal plane imaging, the conditions for the layer thickness 5mm, TE20 ~ 90msec, TR2000 ~ 2500msec. Coronal Tl weighted TR / TE = 500 ~ 800/10 ~ 20msec, the thickness of 3 ~ 5mm, the matrix 256 * 192; T2 weighted image TR / TE = 2500/20 ~ 90msec, some patients with reverse recovery sequence / TE1500 / 20 ~ 30msec, IR150 ~ 600). G-DTPA enhancement was observed when MRI showed abnormal lesions. Determine the presence or absence of abnormal lesions based on the following criteria: (1) focal or diffuse lobular atrophy (such as temporal lobe atrophy); (2) focal or diffuse ventricular enlargement; (3) structural atrophy (hippocampal atrophy); (4)