Radioiodine uptake in thyroid remnants during therapy after tracer dosimetry.

Abstract

The percentage uptake of the therapeutic dose is on average only one half of that predicted from the dosimetric uptake in thyroid remnants after surgery, even though the median dosimetric dose was only 40 MBq. This reduced uptake should be accounted for in the therapeutic prescription for thyroid ablation or treatment of residual thyroid cancer. We postulate that this effect is caused by radiation damage from the tracer dose during dosimetry.