小儿脑发育的低场强磁共振成像技术研究  

Low-field MRI technique study of children′s developing brain

作　　者：王晓明[1] 陈丽英[2] 郭启勇[2] 

机构地区：[1]中国医科大学第三临床学院放射科,沈阳110022 [2]中国医科大学第二临床学院放射科

出　　处：《中华放射学杂志》2002年第6期554-556,共3页Chinese Journal of Radiology

摘　　要：目的　优选适合发育期小儿脑的低场强MR扫描序列。方法　测量半卵圆中心灰、白质的T2 值 ,观察T2 值随月龄的变化。采用 3种长TR序列 [(1)常规TR 2 70 0ms,TE 4 0、80ms;(2 )中等长TR 4 0 0 0ms,TE 4 0、80ms ;(3)特长TR 5 0 0 0～ 80 0 0ms ,TE 4 0、80ms]对各年龄组小儿进行检查 ,对各T2 WI质量加以对比分析。结果　T2 值的变化与髓鞘形成过程一致 ;新生儿期应选择特长TR序列 ,婴儿期应选择中等长TR序列 ,14个月以后可选常规TR序列。结论　在观察新生儿、婴儿期脑室及脑外间隙时 。Objective To evaluate suitable scan sequence of Low Field (0 35 T) MRI for children′s brain in development phase Methods The T 2 values of gray and white matter of centrum semiovale were measured The change of the T 2 value with the age was observed Three types of long TR scan sequence were performed These were routine TR, i e 2 700/40, 80 ms, long TR, i e 4 000/40, 80 ms, and extra long TR, i e 5 000～8 000/40, 80 ms They were applied to children of different age group And the quality of T 2WI was compared and analyzed Results The change of T 2 value was consistent with the process of myelinization Extra long TR sequence should be chosen for newborns Long TR sequence should be chosen for infants And routine TR sequence may be used in children older than one year old Conclusion In observing cerebral ventricle and extracerebral space of newborn and infant, image of long TR sequence is better than that of routine TR sequence

关 键 词：脑发育 低场强磁共振成像技术 儿童 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]