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| 快速多时相减影CE-MRA对头颈部TOF-MRA伪影的矫正 | |
| 引用本文： | 韩鸿宾,沙琳,刘洪东,许峰,边杰,刘溢,杨玉杰.快速多时相减影CE-MRA对头颈部TOF-MRA伪影的矫正[J].中国医学影像技术,2003,19(5):632-635. |
| 作者姓名： | 韩鸿宾 沙琳 刘洪东 许峰 边杰 刘溢 杨玉杰 |
| 作者单位： | 1. 北京大学第三医院放射科,北京,100083 2. 大连医科大学附属第二医院放射科 3. 鞍山市中心医院放射科 4. 北京大学第三医院医工处,北京,100083 5. 北京大学第三医院超声科,北京,100083 |
| 基金项目： | 北京大学"985"临床多中心前瞻性研究资助项目. |
| 摘 要： | 目的 通过总结TOF-MRA(time of flight MRA)常见伪影的表现,分析其形成原因以及研究CE-MRA(contrast enhanced MRA)对其的矫正作用。方法 同时进行头颈部TOF-MRA与CE-MRA检查患者共217例,以手术或DSA结果为金标准,对TOF-MRA出现的各种伪影与CE-MRA图像进行对比分析。结果 在217例患者中,TOF-MRA出现伪影266处,其中狭窄后湍流伪影25处,流动分离67处,流动移位37处,边缘锯齿伪影72处,威氏暗带伪影65处,CE-MRA对TOF-MRA中相对应部位的伪影均进行了矫正。结论 头颈部TOF-MRA中伪影是常见的现象,需要正确认识这些伪影,提高诊断的正确率;TOF-MRA出现的伪影可以通过CE-MRA进行矫正。 |
| 关 键 词： | 磁共振 血管成像 造影剂 伪影 |
| 文章编号： | 1003-3289(2003)05-0632-04 |
| 收稿时间： | 2003/1/10 0:00:00 |
| 修稿时间： | 2003年1月10日 |
Correction of the Artifacts in Cranial and Cervical TOF-MRA by Rapid Multiple-Phase CE-MRA |
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| HAN Hong-bin,SHA Lin,LIOU Hong-dong,XU Feng,BIAN Jie,LIU Yi and YANG Yu-jie.Correction of the Artifacts in Cranial and Cervical TOF-MRA by Rapid Multiple-Phase CE-MRA[J].Chinese Journal of Medical Imaging Technology,2003,19(5):632-635. | |
| Authors: | HAN Hong-bin SHA Lin LIOU Hong-dong XU Feng BIAN Jie LIU Yi and YANG Yu-jie |
| Institution: | Departement of Radiology,Peking Universrity Third Hospital,Beijing 100083,China;Departement of Radiology,Peking Universrity Third Hospital,Beijing 100083,China |
| Abstract: | Objective To summarize the appearances of the artifacts in cranial and cervical TOF-MRA. To analyze the causes and to study the artifact correction of contrast enhanced MRA (CE-MRA). Methods TOF-MRA and CE-MRA examinations were performed in 217 patients simultaneously. Artifacts appeared in TOF-MRA and the corresponding images of CE-MRA were summarized and analyzed. The results were compared with the findings on DSA or in surgery. Results Among the 217 cases, there were 266 artifacts in TOF-MRA . The artifacts included turbulent behind stenosis (25), mobile separations (67), mobile shifts (37), margin zigzag artifacts (72) and dark band (65). CE-MRA corrected all the artifacts appeared in TOF-MRA. Conclusion Artifacts,which are common,could be corrected by CE-MRA.Eavaluating them correctly are needed to improve the diagnostic accuracy. |
| Keywords: | Magnetic resonance Vascular imaging Contrast medium Artifact |
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