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报告42例临床诊断为脑供血不足病人的SPECT及BEAM,阳性率分别为86%及19%,二者有显著性差异(P<0.01)。SPECT在rCBF低于正常10%时即可显示缺血灶,而BEAM较易反映大脑半球功能变化。SPECT能检出脑血流高于症状发生阈25ml/(100g.min)而低于生理阈值50ml/(100g.min)的潜在性缺血病灶,为临床提供超早期治疗依据。在脑供血不足缓解期检查SPECT,发现部分病例rCBF减低,提示缓解期也存在慢性低灌注状态并应进行必要的治疗。
The positive rate of SPECT and BEAM in 42 patients with clinical diagnosis of cerebral insufficiency was 86% and 19%, respectively, with significant difference (P <0.01). SPECT shows ischemic foci when rCBF is below 10% of normal and BEAM is more likely to reflect changes in cerebral hemispheric function. SPECT could detect potential ischemic lesions whose cerebral blood flow was higher than the threshold of 25ml / (100g.min) and lower than the physiological threshold of 50ml / (100g.min), providing the basis for ultra-early clinical treatment. Examination of SPECT in remission of cerebral insufficiency found that rCBF was reduced in some cases, suggesting that there was also chronic hypoperfusion in remission and the necessary treatment should be performed.