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使用动态正电子发射体层摄影术(PET)可以在体测量血液向脑和肿瘤传输82Rb(半衰期为76秒)的单向传输率常数(K_1)和单位质量脑或肿瘤组织的血浆水体积(V_p),其测量精度依赖于局部脑或肿瘤放射性的PET测量精度和整个血液放射性的井式闪烁探测器测量精度。一个两室模型已被用于从82Rb/PET数据中推导K_1、K_2(流出率
Using positron emission tomography (PET), the unidirectional transfer rate constant (K_1) of 82Rb (half-life of 76 seconds) and the plasma water volume of the unit mass brain or tumor tissue V_p) whose measurement accuracy depends on the PET measurement accuracy of local brain or tumor radioactivity and the accuracy of the wellbore scintigraphy of the whole blood radioactivity. A two-compartment model has been used to derive K_1, K_2 from the 82Rb / PET data (outflow rate