Development of a scalable and deformable stylized eye model for radiation dose assessment

Furuta, Takuya   ; El Basha, D.*; Iyer, S. S. R.*; Correa Alfonso, C. M.*; Bolch, W. E.*

With recent changes in the recommended annual dose limit on eye lens by International Commission on Radiological Protection, several Monte Carlo studies has been performed using a computational eye model. Although there are a large variety in size and shape for individual eyes, the eye model of one standard eye size and shape was adopted in most of those studies. We therefore constructed a geometric eye model that is both scalable and deformable, and studied dosimetry influence on the variation of the eye size and shape in the standard radiation geometries using Monte Carlo radiation transport code PHITS. We confirmed that only a trivial dependence on the eye size and shape, namely variation of the depth location of the ocular structures, was observed for radiation exposure in the broad radiation geometries.