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用放射性同位素进行体外测定是:(1)通过放射性同位素的分布可以得到闪烁图;(2)通过放射性同位素的不同时相的变化可以测得动态机能改变为特征的检查方法。即不只限于形态学的诊断,还可以进行机能诊断。此优点可以考虑应用于上消化道的诊断。~(99m)Tc-过锝酸盐为胃粘膜上皮所聚积,故可利用它检查Meckel憩室、Barrett食道、胸腔内胃原性脓肿等。又据Marsden等报告经静脉注入可以诊断胃癌。基于此点,采用~(99m)Tc-过锝酸盐就上消化道的形态学和机能学诊断的方法加以讨论。一是~(99m)Tc-过锝酸盐口服对通过障碍的部位
In vitro determination with radioisotopes is: (1) a scintigraphy can be obtained by the distribution of radioisotopes; and (2) dynamic changes in the properties can be measured by changes in the different phases of the radioisotope. That is not only the diagnosis of morphology, but also for functional diagnosis. This advantage can be considered for the diagnosis of the upper gastrointestinal tract. ~ (99m) Tc-pertechnetate gastric mucosa epithelial accumulation, it can be used to check Meckel diverticulum, Barrett’s esophagus, pleural gastritis and other abscesses. According to Marsden and other reports can be diagnosed by intravenous injection of gastric cancer. Based on this, the use of ~ (99m) Tc-pertechnetate is discussed in terms of morphological and functional diagnostics of the upper gastrointestinal tract. First, ~ (99m) Tc-percyanite salt oral through the site of the disorder