After a statement of the simplifying assumptions needed to establish rather simple models for the mechanisms of the routes of entrance and for the compartments within the body, this study develops the following: (1) Kinetics of the absorption of tellurium and iodine through the lung and digestive tract as routes of entrance. With the systematic application of the mathematical method of the convolution product to the several stages of the intestinal transit, the entry functions of tellurium and iodine into the body can be calculated. (2) Sets up and solves the differential equations corresponding to the kinetics of the four-compartment model adopted for tellurium and iodine in the body. (3) Estimates the dose-equivalent rate delivered to the thyroid by iodine-132 originating from inhaled tellurium-132. Variation of this dose-rate as a function of time, its graphic representation are determined also. The dose-rate passes through a maximum value equal to 4 × 10−5 rem/hr per μCi of inhaled tellurium-132, approximately 13 hr after inhalation. The accumulated dose reaches a value of some 0.25 rem/μCi and half the dose is delivered during the first 60 hr.
©1966Health Physics Society