论文部分内容阅读
Kety和Schmidt两人在1948年发表了使用惰性气体N_2O吸入法,测定人类全脑血流量以来的 40年中,人们广泛利用各种惰性气体测定了全脑血流量,获得了各种脑循环的生理和病理知识。跨入60年代以后,随着医疗仪器的发展,加上同位素标记物质的开拓,局部脑血流量测定被利用到临床上来,而且对人体的损害也越来越轻,到70年代以后出现了非损伤性的局部脑血流量和脑代谢的测定。目前经常使用的脑循环测定法可归纳为:(1)惰性扩散性气体分析法。(2)惰性扩散性同位素标记法。(3)惰性非扩散性同位素标记法。(4)正电子发射断层摄影(Positron Emission Tomography)。以上四种方法,除了(3)是计算脑血液量外,其余三种方法全部是测
In the 40 years since Kety and Schmidt (1948) used inert gas N2O inhalation to measure whole-brain blood flow in humans, whole-brain blood flow was measured using a variety of inert gases and various brain circulations Physiological and pathological knowledge. Into the 60’s, with the development of medical equipment, coupled with the development of isotope labels, the local cerebral blood flow measurement is utilized clinically, but also the damage to human body more and more light, to the 70’s after the emergence of non- Decreased regional cerebral blood flow and brain metabolism. The currently used cerebral circulation assay can be summarized as: (1) inert diffusible gas analysis. (2) Inert diffusible isotope labeling method. (3) Inert non-diffusible isotope labeling method. (4) Positron Emission Tomography. The above four methods, except (3) is to calculate the amount of cerebral blood, the remaining three methods are all measured