颅内血肿的低场MRI表现

Study on Low Field MRI Image on Intracranial Hematoma

目的:探讨颅内血肿的低场MRI表现。方法:对67例颅内血肿患者MRI片进行回顾性分析。结果:急性期血肿于T1WI呈低、等信号,T2WI呈高、等信号。GRET2*WI序列均呈低信号。亚急性早期血肿T1WI仍呈等、低信号,T2WI均呈高及略高信号。亚急性中期T1WI出现典型外周环状高信号,中间等、低信号,T2WI仍呈高及略高信号。亚急性晚期T2WI呈明显均匀高信号,T1WI多数为外周环状高信号,中间等低信号或均匀高信号。慢性期血肿逐渐演变成液化灶,呈均匀长T1、长T2信号。结论:颅内血肿急性期、亚急性各期及慢性期在低场MRI上均能较好显示病变特点,具有特征性。

Objective：To study the low field MRI image on intracranial hematoma. Method： We reviewed MRI datas on 67 cases intracranial hematoma. Result： MRI exhibited signal intensity of acute and subacute or chronicity premature hematoma, Thatg hematomas during acute period shoued hypointense and equal signal intensity on T1 - weighted images and hyperintense and T2 - weighted images equal signal intensity. GRE T2 ＊ WI was hypointense. Insubacute period which showed hypointense and equal signal intensity on T1WI and hyperintense on T2WI. In the mid -term of subacute period showed T2WI hyperintense typical hyperintense in peripheral annular, equal and hypointense in central area. In late subacute period showed obviously hyperintense on T2WI, most of hpyerintense on T1WI in peripheral annular, equal signal intensity or hyperintense in central area. Hematomas resulted in liquefaction in chronicity, with long T1 ,T2 signal.Conclusion： There′s typical feature on MRI of intraeranial hematorma in acute and subacute or chronic period.