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目的探讨高分辨磁共振成像(high resolution magnetic resonance imaging,HRMRI)对内囊纹状体梗死(striatocapsular infarction)的诊断价值。方法收集经磁共振证实的内囊纹状体梗死患者26例,分别行磁共振血管成像(magnetic resonance angiography,MRA)和HRMRI检查,利用HRMRI分析动脉粥样硬化斑块在大脑中动脉(middle cerebral artery,MCA)的分布位置,比较MRA与HRMRI识别MCA狭窄能力的差异。结果MRA检查显示MCA狭窄者10例(38.5%),HRMRI显示MCA狭窄者20例(76.9%)(χ~2=4.875,P=0.027)。HRMRI显示MCA狭窄的20例患者,其粥样硬化斑块位于血管管壁的下侧12例(60.0%)、腹侧6例(30.0%)、上侧2例(10.0%)、背侧0例(χ~2=7.600,P=0.022)。结论HRMRI在诊断MCA狭窄方面可信度较高;内囊纹状体梗死患者MCA粥样硬化斑块大多分布在穿支动脉开口对侧。
Objective To investigate the diagnostic value of high resolution magnetic resonance imaging (HRMRI) in striatocapsular infarction. Methods Twenty-six patients with intracavitary infarction who were confirmed by magnetic resonance imaging were collected. Magnetic resonance angiography (MRA) and HRMRI were performed respectively. HRMRI was used to analyze the distribution of atherosclerotic plaque in the middle cerebral artery artery, MCA), and to compare the differences between MRA and HRMRI in identifying MCA stenosis. Results MRA showed 10 cases (38.5%) with stenosis of MCA and 20 cases (76.9%) with stenosis of MCA in HRMRI (χ ~ 2 = 4.875, P = 0.027). HRMRI showed that in 20 patients with MCA stenosis, atherosclerotic plaque was found in 12 cases (60.0%) on the lower side of the vessel wall, 6 cases (30.0%) on the ventral side, 2 cases (10.0%) on the upper side and 0 Example (χ ~ 2 = 7.600, P = 0.022). Conclusion HRMRI is more reliable in the diagnosis of MCA stenosis. Most of MCA plaque in patients with intravitreous embolism are located on the contralateral side of perforator artery.