| 武靖,刘伟,杜湘珂,李毅,吴巍珍,王正.3.0T MR流入反转恢复序列门静脉成像及影响成像质量的技术因素[J].中国医学影像技术,2013,29(6):1011~1014 |
| 3.0T MR流入反转恢复序列门静脉成像及影响成像质量的技术因素 |
| IFIR sequence on 3.0T MR portal venography and influence of technological elements on imaging quality |
| 投稿时间：2012-12-27 修订日期：2013-03-31 |
| DOI： |
| 中文关键词: 流入反转恢复 磁共振血管造影术 门静脉成像 |
| 英文关键词:Inflow inversion recovery Magnetic resonance angiography Portal venography |
| 基金项目: |
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| 摘要点击次数: 2426 |
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| 中文摘要: |
| 目的 探讨3.0T MR流入反转恢复(IFIR)序列对门静脉系统进行非对比增强成像的可行性及影响成像质量的技术因素。 方法 采用GE Signa HDx 3.0T MR扫描仪对240例患者行冠状位IFIR序列扫描。在GE AW4.4工作站行三维MIP重建,对门静脉各级分支显示程度及清晰度进行评分,并与呼吸频率及呼吸节律、反转时间(TI)等因素进行对比,分析影响成像质量的技术因素。 结果 门静脉显示情况(TI 900 ms):5分32例,4分62例,3分64例,2分20例,1分27例,0分35例;高分组(3~5分)158例(158/240,65.83%),低分组(0~2分)82例(82/240,34.17%);图像质量评分受设备序列(包括IFIR序列本身不稳定因素、预饱和带放置位置)及患者个体因素(包括呼吸因素、TI)的影响。 结论 3.0T MR IFIR冠状位血管成像序列可用于显示门静脉系统。 |
| 英文摘要: |
| Objective To evaluate the feasibility of inflow inversion recovery (IFIR) sequence in non-enhanced 3.0T MR portal venography, and to investigate the influence of technological elements on imaging quality. Methods Totally 240 patients received upper abdominal examination on GE Signa HDx 3.0T MR with coronal IFIR sequence. MIP reconstruction was done on AW 4.4 workstation to evaluate the branches and trunk of portal vein. Image quality was also assessed and compared with those technological elements of breathing, inversion time (TI) and so on. Results Among 240 patients, the score of imaging quality of the portal vein was grade 5 in 32 patients, grade 4 in 62,grade 3 in 64, grade 2 in 20 and grade 1 in 27 patients,while was grade 0 in 35 patients. There were 158 patients (158/240, 65.83%) in high grade group (3-5 grade) and 82 patients (82/240, 34.17%) in low grade group (0-2 grade). The imaging quality was affected by several technological elements, including magnetic ability (unstable factors of IFIR sequence and the type of pre-saturated band) and personal elements (breathing and TI). Conclusion IFIR sequence is a feasible non-enhanced MR imaging method for portal vein at 3.0T MR system. |
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