高分辨率磁共振对桥脑旁正中梗死的诊断应用

Diagnosis Application of High-resolution Magnetic Resonance Imaging in Paramedian Pontine Infarction

目的探讨高分辨率磁共振(high-resolution MRI,HRMRI)对脑桥旁正中梗死的诊断价值。方法收集经MR证实的脑桥旁正中梗死患者21例,分别行磁共振血管成像(MRA)和HRMRI检查,比较MRA与HRMRI在识别基底动脉狭窄的异同,并利用HRMRI观察动脉粥样硬化斑块在基底动脉的分布和梗死部位的关系。结果 MRA发现8例有基底动脉狭窄(狭窄率38.10%),而HRMRI发现18例有基底动脉狭窄(狭窄率85.71%),两种方法发现基底动脉狭窄率比较差异有统计学意义(P<0.01)。18例基底动脉狭窄的患者中动脉粥样硬化斑块主要位于梗死同侧占16例(88.89%),对侧仅2例(11.11%)。结论 HRMRI发现基底动脉狭窄的检出率高,同时发现桥脑旁正中梗死患者基底动脉斑块大多分布在脑桥梗死的同侧。

Objective To observe the diagnoses application of high-resolution magnetic resonance imaging in paramedian porntine in- farction. Methods Twenty-one patients with pontine infarction underwent basilar angiography using MRA and high-resolution MRIto assess the presence of basilar arterystenosis, the relationship between the distribution and area of infarction of atherosclerotie plaque inthe basilar artery were also assessed using high-resolution MRI. Results 18 cases of basilar artery stenosisdetected by high-resolution MRI （85.71%） compared with 8cases detected by MRA imaging （38.10%）, there were significant statistically differences （P 〈 0.01）. The basilar artery athemsclemsis are mainly distributed in the ipsilateral of paramedian pontine infarction （88.89%）, only two of eighteen located in the contralateral （11.11% ）. Conclusions High-resolution MRI is more sensitive to detect based artery stenosis compared with MRA imaging. The basilar artery athemsclemsis are mainly distributed in the ipsilateral of paramedian pontine infarction.