目的研究弥散加权成像(DWI) 与磁共振血管成像(MRA)联合检测在急性 脑梗死(ACI)患者血管病变评估及临床意 义。方法 选取94例ACI确诊患者，分别 进行DWI和MRA检查，分析检查结果。结 果 经确诊，94例患者中单病灶63例，多 发病灶31例，治疗前后，患者NIHSS评分 分别为[(12.86±2.97)分和(8.72±1.64) 分，P<0.05]；其中DWI检测阳性92例 (97.87%)；显示患者两侧脑组织ADC值差 异显著(P<0.05)，不同发病时间段患者 患侧ADC值及rADC先明显降低(P<0.05)， 24h后显著升高(P<0.05)；MRA检查阳性89 例(94.68%)；血管狭窄程度与rADC呈正 相关，与治疗前NIHSS评分呈正相关，与 NIHSS评分治疗前后差值呈正相关；rADC 与治疗前NIHSS评分呈正相关，与NIHSS评 分治疗前后差值呈正相关。结论 DWI能 清楚显示ACI患者早期病灶位置和缺血程 度，MRA则可准确定位导致梗死发生的责 任血管及其狭窄程度，二者联合应用有助 于ACI患者早期诊断和病情评估，为临床 治疗提供理论依据，从而使患者获得及时 有效干预，缓解病情，改善预后。

Objective To study the evaluation and clinical significance of diffusion weighted imaging (DWI) and magnetic resonance angiography (MRA) in vascular lesions of patients with acute cerebral infarction (ACI). Methods 94 cases of ACI diagnosed patients were selected and given DWI and MRA examinations. The examinations results were analyzed. Results There were 63 single lesions and 31 multiple lesions in 94 patients after diagnosis, and the NIHSS scores were (12.86±2.97) points and (8.72±1.64) points respectively before and after treatment (P<0.05). 92 cases (97.87%) were positive by DWI, and there were significant differences in ADC value of bilateral brain tissue (P<0.05), and the ADC value and rADC of the affected side were first decreased significantly (P<0.05) and then increased significantly after 24h (P<0.05). 89 cases (94.68%) were positive by MRA examination. The degree of vascular stenosis was positively correlated with rADC, and was positively correlated with the NIHSS score before treatment, and was positively correlated with the difference value of NIHSS score before and after treatment. The rADC was positively correlated with NIHSS score before treatment, and was positively correlated with he difference value of NIHSS score before and after treatment. Conclusion DWI can clearly show the location of early lesions and the degree of ischemia in ACI patients. MRA can accurately locate the responsible vessels and its stenosis degree that lead to infarction. The combination of the two can be helpful for the early diagnosis and assessment of ACI, and can provide a theoretical basis for clinical treatment, thereby helping patients receive timely interventions to ease the disease and improve prognosis.