This study demonstrated that the occipital region is the predominant PSD location during NET for unruptured intracranial aneurysms. Non-stent procedures and a high K_a,r ratio were identified as key procedural predictors associated with occipital PSD distribution.

Our previous work showed that PSD measured using RPLDs exhibits a strong correlation with K_a,r and P_KA in both diagnostic cerebral angiography and NET, enabling accurate prediction of PSD value ^(6-9). In contrast, the identification of PSD location has not been systematically investigated, largely because it is influenced by a complex interplay of patient-related and procedural factors.

Our findings support two major implications:

1. Predictive modeling of radiation risk: integrating dose magnitude predictors (K_a,r, P_KA, PSD) with location predictors enables high-precision estimation of both PSD value and its anatomical distribution.
2. Improved radiation safety: understanding how procedural factors influence PSD location facilitates optimization of working projections, dose monitoring, and patient counseling, contributing to safer and higher-quality NET.

These results may serve as a foundation for future radiation dose management strategies and for developing practical guidelines to prevent radiation-induced skin injury in neuroendovascular procedures.