A Study to Analyze Impact of Treatment Couch and Immobilization Devices on Surface Dose for Megavoltage Photon Beams.

ABSTRACT:

Purpose/objective

The purpose of this study is to investigate the effect of treatment couch and immobilization devices on surface dose for megavoltage photon beams.

Material/methods

Percentage surface dose (PSD) measurement was carried out in Elekta Synergy™ Linear accelerator using PTW Markus® Parallel plate ionization chamber of volume 0.05cm3 with water equivalent RW3 Slab phantom (PTW, Germany). The measurement depth was considered at 0.07mm. The reference PSD was measured at 0° gantry angle with 10×10cm2, 20×20cm2 and 30×30cm2 field sizes and 100cm SSD for 4MV, 6MV and 15MV photon beams. For comparison, PSD measurement was carried out at 180° gantry angle inclusion of treatment couch (TC), All in One positioning system (AIO - PS) and Vac lok Cushions (VLC).

Results</

SUBMITTER: D P 

PROVIDER: S-EPMC10909093 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature