SWI 序列扫描对颅内海绵状血管瘤患儿的诊断价值

【目的】探讨磁敏感加权成像(SWI)序列在儿童颅内海绵状血管瘤(ICA)诊断中的应用价值。【方法】回顾性分析23例收治的行头颅常规 MRI 序列及 SWI 序列扫描检查的23例经手术证实为 ICA 患儿的临床资料，其中男14例，女9例，对常规MRI 序列及 SWI 序列扫描的病灶大小、形态、信号特点进行比较分析，综合评价 SWI 序列在儿童 ICA 诊断中的优势。【结果】所有 ICA 病灶均在 SWI 序列显示，且具有典型特征的“铁环征、桑椹状、爆米花征”、圆形或类圆形及不规则形极低信号及混杂信号，边界清楚，病灶直径约为0.20~5.71 cm。常规 MRI 序列扫描对小于3 mm 病灶均无法显示，但其在 SWI 序列扫描多以类圆形低信号及混杂信号为主。SWI 序列对微量、静止出血的检测更为敏感，对小静脉血管显示较清晰。【结论】SWI 序列扫描儿童ICA 具有较高敏感性，弥补常规 MRI 序列扫描未能发现的病灶，对儿童 ICA 的早期诊断具有重要价值。

Value of Susceptibility Weighted Imaging(SWI)in Diagnosis of Intracranial Cavernous Angioma(ICA)in Children

Objective]To investigate the applicable value of susceptibility weighted imaging(SWI)in diagnosis of intracranial cav-ernous angioma(ICA)in children.Methods]The clinical data of 23 children with ICA confirmed by operation were retrospectively an-alyzed,and the conventional MRI sequences and SWI sequences of the skull were scanned and examined.Among them,14 cases were male and 9 were female.The size,shape and signal characteristics of the lesions were compared and analyzed.The advantages of SWI sequence in the diagnosis of ICA in children were comprehensively evaluated.Results]All ICA lesions were displayed in SWI sequence, and had the typical characteristics of the"hoop sign,mulberry,popcorn syndrome".With round or about round shape,and irregular shape with very low signal and mixed signal,the boundary was clear,the focus diameter was about 0.20 ~ 5.71 cm.Conventional MRI sequence scan can not show the lesions of less than 3 mm,However,the SWI sequence is mainly based on the class of low signal and mixed signal,more sensitive to the detection of trace and still bleeding,and the display of small vein blood vessels is more clear.Con-clusion]SWI sequence scanning in children with ICA has a high sensitivity to make up for the lesions that the routine MRI sequence scan fails to find,and has important value for the early diagnosis of ICA in children.