| 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 |
| 快速多时相减影CE-MRA对头颈部TOF-MRA伪影的矫正 |
| Correction of the Artifacts in Cranial and Cervical TOF-MRA by Rapid Multiple-Phase CE-MRA |
| 投稿时间：2003-01-10 |
| DOI： |
| 中文关键词: 磁共振 血管成像 造影剂 伪影 |
| 英文关键词: Magnetic resonance Vascular imaging Contrast medium Artifact |
| 基金项目:北京大学"985"临床多中心前瞻性研究资助项目。 |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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