Rundo 等人提出的关于人体中钡的多间隔模型滞留函数,不适用于注入钡后第一周的情况,因为用不同方法从人体及排泄物的放射性测量中所得到的这段期间的全身滞留数据,作者们并不认为可靠。最近,他们利用0.25～5.00天的全身滞留量的估计值试验了包括五个指数项的函数分析。假设粪便的累积排泄量为尿累积排泄量的9倍,即可算出全身滞留量。 Rundo et al.’s proposed multiple compartment model retention function for barium in humans does not apply to the first week after barium injection since systemic retention during this period of time obtained from radioactivity measurements of human and fecal material by different methods Data, the authors do not consider reliable. Recently, they used functional estimators of five exponential terms using an estimate of 0.25 to 5.00 days of whole body retention. Assuming that the accumulated excretion of excrement is nine times the cumulative urinary excretion, the body mass retention can be calculated.