Three-dimensional dose uncertainty maps based on the fraction of field edge dose for volumetric modulated arc therapy plans.

ABSTRACT:

Background and purpose

Absorbed dose uncertainties in radiotherapy plans are generally larger near field edges compared to the center of the field. The aim of this study was to investigate dose uncertainties related to the field edge in 3D for plans of varying complexities.

Materials and methods

A method was developed for calculation of the fraction of field edge dose (FED), that could be visualized as a 3D uncertainty map (3DUM_FED). Twelve clinical treatment plans were included for four different treatment sites that were reoptimized to create one plan with reduced complexity and one of increased complexity. 3DUM_FED was calculated for all 36 plans. The highest FED for a 2 cm³ volume (FED_{2 cm} ³) and average FED (FED

SUBMITTER: Terzidis E 

PROVIDER: S-EPMC12271897 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature