不同层厚SWI对大脑内静脉及属支成像的比较研究  

A comparative study of intracerebral veins and tributaries by SWI with different slice thicknesses

作　　者：陈冠峰[1] 向意娟 谭长连[2] 张洪春[2] 孙炳庆[1] Chen Guanfeng;Xiang Yijuan;Tan Changlian;Zhang Hongchun;Sun Bingqing(Department of Radiology, the Second Xiangya Hospital of Central South University, Changsha 410011, China)

机构地区：[1]福建医科大学附属泉州第一医院影像科,福建省泉州362000 [2]中南大学湘雅二医院放射科,长沙410011

出　　处：《中国医师杂志》2018年第12期1824-1828,共5页Journal of Chinese Physician

摘　　要：目的比较扫描层厚分别为2. 0 mm和1. 0 mm的两种磁敏感加权成像(SWI)序列扫描方案对大脑内静脉及属支的成像能力。方法招募47例健康志愿者,其中男20例,女27例,年龄21～45(30. 1±12. 93)岁。对所有健康志愿者进行层厚分别为2. 0、1. 0 mm的两种SWI序列扫描。两种SWI扫描方案所得图像经MIP重建后,由两名医生统计大脑内静脉及属支的显示率及静脉直径,统计分析使用McNemar检验及两配对样本t检验。结果⑴双侧大脑内静脉、丘纹静脉及左侧侧脑室内静脉在两种扫描方案上的显示率均为100%,而左右两侧透明隔静脉、尾状核前静脉及右侧侧脑室内静脉在层厚为2. 0 mm的SWI序列图像上的显示率分别为90. 0%(左)、91. 0%(右)、87. 2%(左)、85. 1%(右)、91. 5%,在层厚为1. 0 mm的SWI序列图像上的显示率分别为97. 9%(左)、94. 0%(右)、97. 9%(左)、95. 7%(右)、95. 7%。⑵在两种扫描方案上双侧透明隔静脉、双侧尾状核前静脉所测静脉直径差异有统计学意义(P <0. 05),双侧大脑内静脉、双侧丘纹静脉及双侧侧脑室内静脉所测直径差异均无统计学意义(P> 0. 05)。⑶两种扫描方案对直径> 0. 9 mm的静脉显示率均为100%,而对直径为0. 6～0. 9 mm(包括0. 6 mm及0. 9 mm)静脉的显示率差异有统计学意义(P <0. 05)。结论 SWI序列能够清晰显示大脑内静脉及属支的解剖走形,层厚为1. 0 mm的SWI序列扫描方案对较细脑静脉的显示能力高于层厚为2. 0 mm的SWI序列扫描,因此利用层厚为1. 0mm的SWI序列扫描方案将更有利于观察及研究大脑内静脉及属支。Objectives To investigate the imaging ability of magnetic sensitive weighted imaging (SWI) scans with 2.0 mm and 1.0 mm slice thickness on intracerebral veins and branches. Methods 47 healthy volunteers were recruited, including 20 males and 27 females, aged 21-45 (30.1±12.93). Two SWI sequences with thickness of 2.0 mm and 1.0 mm were performed in all healthy volunteers. After reconstructed by minimal intensity projection (MIP), the display rate and diameter of intracerebral veins and branches were counted by two doctors. McNemar test and paired t-test were used for statistical analysis. Results ⑴ The display rates of bilateral internal cerebral veins, papular veins and left ventricular veins were 100% in both scanning schemes, while the display rates of left and right septal veins, anterior caudate nucleus veins and right ventricular veins on SWI sequence images with 2.0 mm thickness were 90.0% (left), 91.0% (right) and 87.2% (right), 91.5%, respectively. The display rates on SWI sequence images with 1.0 mm thickness were 97.9% (left), 94.0% (right), 97.9% (left), 95.7% (right) and 95.7% respectively. ⑵ There were significant differences in the diameter of bilateral septum pellucidum veins and bilateral anterior caudate nucleus veins between the two scanning schemes (P<0.05). While there was no significant difference in the diameter of bilateral internal cerebral veins, bilateral papular veins and bilateral intraventricular veins (P>0.05). ⑶ The displaying rate of veins with diameter >0.9 mm was 100% for both scanning schemes, while the displaying rate of veins with diameter ranging from 0.6-0.9 mm (including 0.6 mm and 0.9 mm) in the two scanning schemes had significant difference (P<0.05). Conclusions SWI sequence can clearly show the anatomical shape of intracerebral veins and branches. In contrast to SWI of the scan slices thickness of 2.0 mm, the SWI of scan slices thickness of 1.0 mm showed more efficiency in display thinner brain venous.Therefore, using SWI sequence scanning scheme with 1.0 mm sli

关 键 词：脑静脉/放射摄影术 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]