Experimental investigation of the effective point of measurement for plane-parallel chambers used in electron beam dosimetry.

ABSTRACT: In this study, the effective point of measurement (EPOM) for plane-parallel ionization chambers in clinical high-energy electron beams was determined experimentally. Previous studies have reported that the EPOM of plane-parallel chambers is shifted several tens of millimeters downstream from the inner surface of the entrance window to the cavity. These findings were based on the Monte Carlo (MC) simulation, and few experimental studies have been performed. Thus, additional experimental validations of the reported EPOMs were required. In this study, we investigated the EPOMs of three plane-parallel chambers (NACP-02, Roos and Advanced Markus) for clinical electron beams. The EPOMs were determined by comparing the measured percentage depth-dose (PDD) of the plane-parallel chambers and the PD

SUBMITTER: Yasui K 

PROVIDER: S-EPMC10338742 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature