Measurement Method and Uncertainty Analysis of POF Dosimeter for 125I Source Dose Parameters

To address the problem of
¹²⁵
I seed source dosimetry in brachytherapy, this paper proposes the use of a polymer optical fiber dosimeter to measure seed source dosimetry parameters and gives the uncertainty analysis. The key factors affecting the accuracy of dose measurement around the seed source are discussed, and the uncertainties of the fiber-optic dosimeter, the initial information about the seed source, and the measurement system device are analyzed. The
¹²⁵
I seed source dose parameters are measured according to the TG-43 standard and the two-dimensional dose distributions are presented using interpolation method. The results demonstrate that the optical fiber dosimeter has the ability to measure dose parameters of
¹²⁵
I seed sources.