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目的采用MR新技术T2 Star weighted angiography(SWAN)序列探讨脑微出血的MR影像表现。方法对42例临床有症状的病人进行常规磁共振序列(T1WI、T2WI)、DWI、T2*GRE序列、SWAN序列扫描,筛选出15例有皮层或皮层下微出血的患者,将SWAN得到的图像应用统计学方法与T2*GRE序列图像进行对比。结果 MR新技术SWAN序列与T2*GRE序列相比能发现更多的病灶,T2*GRE序列图像上发现皮层或皮层下微出血的数目是SWAN图像的41.7%,SWAN图像较T2*GRE图像有更高的CNR。结论 SWAN序列是一项新MR技术,能早期发现脑微出血病灶。
Objective To investigate the MR imaging of brain micro-hemorrhage using T2-weighted angiography (SWAN). Methods Totally 42 patients with symptomatic patients underwent routine magnetic resonance (T1WI, T2WI), DWI, T2 * GRE and SWAN scan sequences. Fifteen patients with subcortical or subcapsular hemorrhage were screened. The images of SWAN Application of statistical methods and T2 * GRE sequence images were compared. Results Compared with T2 * GRE sequence, the new SW technique could detect more lesions. The number of cortical or subcapsular hemorrhage detected on T2 * GRE sequence images was 41.7% of the SWAN images, and the SWAN images were higher than those of T2 * GRE images Higher CNR. Conclusion SWAN sequence is a new MR technique that can detect cerebral micro-hemorrhagic lesions early.