Investigation of 2D anti-scatter grid implementation in a gantry-mounted cone beam computed tomography system for proton therapy.

ABSTRACT:

Background and purpose

Robust scatter mitigation by 2D anti-scatter grids (2D-ASG) in proton therapy cone beam computed tomography (CBCT) may improve target visualization and computed tomography (CT) number fidelity, allowing online dose verifications and plan adaptations. However, grid artifact-free implementation of 2D-ASG depends on the CBCT system characteristics. Thus, we investigated the feasibility of 2D-ASG implementation in a proton therapy gantry-mounted CBCT system and evaluated its impact on image quality.

Materials and methods

A prototype 2D-ASG and a grid support platform were developed for a proton therapy CBCT system with a 340 cm source to imager distance. The effect of gantry flex on 2D-ASG's wall shadows and scan-to-scan reproducibility of 2D-ASG's wall sh

SUBMITTER: Pyakurel U 

PROVIDER: S-EPMC11872122 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature