磁敏感加权成像对脑内毛细血管扩张症的诊断价值

Diagnostic value of magnetic susceptibility weighted imaging in capillary telangiectasia of the brain

目的分析SWI对脑内毛细血管扩张症的诊断价值。方法对搜集的5例经临床证实的脑内毛细血管扩张症行常规TSE-IR-T1WI、SE-T2WI及SWI,并对结果进行对比分析。结果5例均为多发病灶,共50灶,呈圆形或类圆形,直径约2mm^1cm。其中桥脑35灶,小脑10灶,基底节区5灶。T1WI等信号20灶,低信号30灶;T2WI等信号16灶,低信号34灶;50灶于SWI均呈低信号,其中39灶呈"靶征"。结论毛细血管扩张症在SWI上磁敏感性增强,有特征性表现,SWI对其检出优于常规MRI技术。

Objective To analysis the diagnostic value of magnetic susceptibility weighted imaging （SWI） in capillary telangiectasia of the brain. Methods The MR findings in TSE-IR-T1WI and SE-T2WI of 5 patients with capillary telangiectasia were compared with those findings in SWI. Results There are multiple lesions in all patients. Fifty lesions are found in 5 patients. The lesions show round or oval shape, ranging from 2 mm to 1 cm in diameter. Among them, 35 lesions are located in the pons, 10 in cerebellum, 5 in basal ganglia. 20 lesions show isointensity and 30 hyposignal intensity on Tl-weighted images. Sixteen lesions show isointensity and 34 hyposignal intensity on T2-weighted images. Fifty lesions all show signal loss on SWI, 39 of them with target sign. Conclusion The magnetic susceptibility of capillary telangiectasia are increased on SWI. SWI can display its characteristic. The detected rate of SWI for capillary telangiectasia are superior to conventional MRI.