| 孟志华,方先来,陈振松,黄瑶群,陆小翎,潘高升.双层螺旋CT血管造影与MR血管造影诊断脑动脉瘤[J].中国医学影像技术,2005,21(3):369~372 |
| 双层螺旋CT血管造影与MR血管造影诊断脑动脉瘤 |
| Intracranial aneurysm: double-helical CT angiography and MR angiography |
| 投稿时间：2004-09-17 修订日期：2005-01-10 |
| DOI： |
| 中文关键词: 脑动脉瘤 血管造影术 计算机断层摄影术 磁共振成像 |
| 英文关键词:Cerebral aneurysm Angiography Computed tomography Magnetic resonance imaging |
| 基金项目: |
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| 中文摘要: |
| 目的 评价双层螺旋CT血管造影(DCTA)与MR血管造影(MRA)诊断脑动脉瘤(AN)的价值。方法 85例用Hispeed NX/i型CT扫描机,以2~3.5 ml/s从前臂静脉注射Ultravist(含30 g碘/100 ml) 60~120 ml等,延迟8~12 s后扫描;准直1~2 mm(HQ),螺距1.2~1.5,0.4~1.2 mm间距后重建;源像输入AW 4.0工作站处理。34例行MRA检查,以2 ml/s从前臂静脉注射Gd-DTPA 20 ml,即刻扫描,层厚1 mm; |
| 英文摘要: |
| Objective To investigate the clinical value of double-helical CT angiography (DCTA) and MR angiography (MRA) for intracranial aneurysm (AN).Methods Eighty-five cases were scanned using Hispeed NX/i scanner. A volume of 60-120 ml Ultravist (30 g Iodine/100ml) was injected at the rate of 2-3.5 ml/s with a scan delay of 8-12 s. Single continuous volume scan was used with 1-2 mm collimation (HQ), pitch 1.2-1.5 and reconstruction interslice distance 0.4-1.2 mm. The source images were transferred to an independent workstation AW 4.0 for 3D reconstruction. Thirty-four cases were examined with MRA, 20 ml of Gd-DTPA was injected at rate of 2 ml/s without delay and with slice thickness of 1 mm. A scan sequence of fl3d-ce-cor was aplied with 9 s one time, total 4 times. The images were reconstructed with multiplanar reconstruction (MPR), maximum intensity projection (MIP), shaded surface display (SSD), and volume rendering (VR). As compared with DSA and operated cases, the data of DCTA and MRA were statistically analyzed with the software of SPSS 10.0. Results DCTA and MRA can demonstrate a longer segment of intracranial vessels with a thinner slice and shorter scan time. The magnitude and location of AN can be accurately showed with MPR, MIP and SSD. Virtual microscopy can provide information about the morphology of space of AN. The sensitivity, specificity and accuracy of DCTA group and MRA group for examined AN were 96%, 96%, 94,75% and 96%, 94%, respectively. Conclusion Emphasizing collecting scan data with moderate multi-model 3D reconstruction, DCTA and MRA can provide useful information in detecting AN. |
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