Cherenkov emission-based quality assurance for linear accelerators.

ABSTRACT: When electrons exceed the speed of light in a medium, they emit low-intensity visible light, known as Cherenkov emission (CE). This study proposes a novel CE-based quality assurance (QA) test for linear accelerators. A CE-based QA (C-QA) phantom incorporating a mock tumor and four CE observation plates (top, bottom, left, and right) was developed. After tumor-based alignment using cone-beam computed tomography (CBCT), lateral and posterior fields were used for irradiation. A C-Dose camera was employed to measure the treatment position, gantry angle, photon energy (TPR20,10), and CE counts for both fields. The treatment position and TPR20,10 were determined by analyzing the changes in the CE profile, while the gantry angle was calculated based on the tilt between the entry and exit field po

SUBMITTER: Okamoto H 

PROVIDER: S-EPMC12856039 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature