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目的：CTP在评估颅内外动脉支架植入术前后脑血流动力学变化中的价值。方法对15例颅内外动脉狭窄患者支架植入术前后行灌注扫描，术前后相对灌注值进行统计分析。结果狭窄血管供血区术后rTTP比术前降低，有统计学意义（P0.05）。结论CTP可较好评估颅内外动脉支架植入术前后脑血流动力学变化，以rTTP较敏感。“,”Objective To evaluate the value of CTP on cerebral blood flow dynamics changes before-after implantation.Methods 15 cases of patients with cerebral artery stenosis were performed CTP scan before-after stent, and relative perfusion values were analyzed statistically. Result The value of rTTP in the blood supply area of narrow vessels with stent postoperative was lower than that of preoperative (P0.05).Conclusion CTP could evaluate changes of cerebral blood flow dynamics before-after implantation of cerebral artery stent, and rTTP was a sensitive idex.