中文摘要：

背景计算断层摄影术(CT ) 在检测 intracranial 石灰化比平淡的磁性的回声成像(MRI ) 好。试图估计在 intracranial 石灰化和 hemorrhage.Methods 的察觉和区别的加权的成像(SWI ) 在这研究注册了的先生危险性的价值的这研究是包括 CT 表明的石灰化的 13 个盒子和 intracerebral 出血的 22 个盒子的 35 个病人。在所有这些题目使用的先生序列包括了轴的 T1WI， T2WI 和 SWI。SWI 上的石灰化和出血的阶段移动(PS ) 被计算，他们的信号在改正的阶段图象上展示被比较。在检测 intracranial 石灰化和出血的 T1WI， T2WI 和 SWI 的敏感是为头部的石灰化的 SWI 的察觉率是的分析 statistically.Results 98.2% ，比 T1 Wl 和 T2WI 的显著地高。它不与 CT 的显著地不同(P > 0.05 ) 。在不同阶段有 49 出血性的损害检测 n SWI， 30 在 T2WI 上并且 18 在 T1WI 上。石灰化和出血的平均 PS 是在检测的 +0.734han 常规 MRI 微出血， SWI 可以在区分与石灰化或出血联系的服的疾病起一个重要作用。

英文摘要：

Background Computed tomography （CT） is better than routine magnetic resonance imaging （MRI） in detecting intracranial calcification. This study aimed to assess the value of MR susceptibility weighted imaging （SWI） in the detection and differentiation of intracranial calcification and hemorrhage. Methods Enrolled in this study were 35 patients including 13 cases of calcification demonstrated by CT and 22 cases of intracerebral hemorrhage. MR sequences used in all the subjects included axial T1WI, T2WI and SWI. The phase shift （PS） of calcification and hemorrhage on SWI was calculated and their signal features on corrected phase images were compared. The sensitivity of T1WI, T2WI and SWI in detecting intracranial calcification and hemorrhage was analyzed statistically. Results The detection rate of SWI for cranial calcification was 98.2%, significantly higher than that of T1WI and T2WI. It was not significantly different from that of CT （P 〉0.05）. There were 49 hemorrhagic lesions at different stages detected on SWI, 30 on T2WI and 18 on T1WI. The average PS of calcification and hemorrhage was ＋0.734±0.073 and -0.112±0.032 respectively （P 〈0.05）. The PS of calcification was positive and presented as a high signal or the mixed signal dominated by a high signal on the corrected phase images, whereas the PS of hemorrhage was negative and presented as a low signal or the mixed signal dominated by a low signal. Conclusions SWI can accurately demonstrate intracranial calcification, not dependant on CT. Being more sensitive than routine MRI in detecting micro-hemorrhage, SWI may play an important role in differentiating cerebral diseases associated with calcification or hemorrhage.