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目的探讨磁共振扩散加权成像(DWI)和CT灌注成像(CTPI)在短暂性脑缺血发作(TIA)患者相关责任病灶的检出率及其较常规MRI检查的优势。方法前瞻性对连续的41例资料完整的TIA患者与20例做对照的健康成人均行DWI和CTPI检查,并进行χ2检验。结果TIA患者的DWI和CTPI对TIA责任病灶的检出率分别为36.6%(15/41)和63.4%(26/41)。DWI共发现15例患者中的18个TIA责任病灶影,病灶多在基底节区,占50%(9/18)。结论DWI和CTPI对TIA责任病灶的检出率明显高于常规MRI,DWI在区分急性和慢性病灶方面有很大价值,对临床诊治和疗效评价很有帮助。
Objective To investigate the detection rate and related advantages of magnetic resonance diffusion-weighted imaging (DWI) and CT perfusion imaging (CTPI) in patients with transient ischemic attack (TIA). Methods Forty-one consecutive patients with complete data of TIA and 20 healthy controls were prospectively evaluated by DWI and CTPI and analyzed byχ2 test. Results The detection rates of DWI and CTPI in TIA patients were 36.6% (15/41) and 63.4% (26/41), respectively. A total of 18 TIA-responsible lesions were found in 15 of 15 patients with DWI, mostly in basal ganglia, accounting for 50% (9/18) of DWI. Conclusions The detection rate of DWI and CTPI on TIA is obviously higher than that of conventional MRI. DWI is of great value in distinguishing acute and chronic lesions, which is helpful for clinical diagnosis and treatment.