| 韩鸿宾,谢敬霞.MR 平面回波快速成像技术与常规MRI 的比较研究[J].中国医学影像技术,2000,16(5):414~417 |
| MR 平面回波快速成像技术与常规MRI 的比较研究 |
| The Comparative Study of MR-EPI with Common MRI |
| 投稿时间：2000-01-22 |
| DOI： |
| 中文关键词: 快速成像 磁共振成像 平面回波成像 |
| 英文关键词:Fast imaging Magnetic resonance imaging Echo-planar imaging |
| 基金项目: |
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| 摘要点击次数: 1418 |
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| 中文摘要: |
| 目的 阐明EPI 的技术特点,与常规MRI 进行比较研究。讨论产生各种新对比度EPI 成像的序列设计
原理。探讨不同类型EPI 在颅脑疾病诊断中的价值与限度。方法 对颅脑疾病125 例进行常规的MR 扫描及EPI
成像。结果 ①成像速度:EPI 成像速度达到30 毫秒/ 层。可去除运动伪影。②EPI-T2WI、EPI-irm 对病灶的显示
率低于TSE-T2WI、TSE-反转恢复序列与双回波序列。对颅内病灶的显示率分别为 |
| 英文摘要: |
| Objective To clarify the technical characteristics of EPI and compare EPI with routine MRI in the diagnosis
of the brain diseases. To discuss the new contrast imaging provided by EPI and its mechannism ,to discuss the value and the
limits of EPI in clinical diagosis. OMethods There are 125 cuses of brain diseases , routine MRI and EPI were performed in
all cases. Results ①The minimum acquisition time for EPI is 30ms ,by which motion artifacts were eliminated. ②EPIT2WI ,EPI2IRM ,TSE-T2WI ,TSE-irm could respectively demonstrate 7.175 % ,82.75 % ,85.06 % ,91.95 % ,91.95 % of
all the lesions. ③The sensitivity of EPI-T3-WI to hemorrhage and the sensitivity EPI-DWI to superacute ischimia were
higher than routine MRI. Conclusion Because of susceptibility artifact and the limit of resolution ,EPI can not take place
of the routine MR scan technique.But MR EPI is the most rapid scan sequence among the clinical available techniques and
EPI could provide several new functional contrast imaging which have great clinical value. |
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