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磁共振弥散张量成像对急性缺血性梗死的诊断价值
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF EMERGENCY MEDICINE
- Issue:
- 9
- DOI:
- 10.3760/cma.j.issn.1671-0282.2009.09.021
- Key Word:
- No keyword available
Abstract： @@ 弥散加权成像(DWI)能够在中风发作即刻显示出脑缺血性改变,它对超急性及急性脑梗死的定位、定性诊断的价值已被公认[1-2].DTI是其技术的延伸,它通过增加采集方向,揭示水分子在三维空间的弥散情况,它侧重反映的是组织结构的空间方向性和完整性.常用弥散各向异性分数来表示,它提供了进一步检测缺血损伤造成的组织微结构改变的能力.大量研究证实中风24 h后缺血区弥散各向异性显著降低[3-5],但24 h内的弥散各向异性变化的报道非常不一致[4-10].因此,本研究侧重探讨DTI对发病24 h内的急性脑梗死的诊断价值.
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