Comparative surface dosimetry in breast cancer in 3DCRT radiotherapy: TLD measurements and TPS evaluation across techniques

Abstract

Breast cancer remains a leading global health issue for women, External Beam Radiotherapy is commonly used post-surgery but often causes acute skin reactions. Accurate calculating superficial doses remains difficult despite Treatment planning system (TPS) advancements, due to particle equilibrium complexities and near-surface modeling limitations. skin dose measurement is critical for effective treatment and minimizing side effects. This study aims to calculate skin doses in breast cancer patients using TLD chips and compare them with TPS-calculated doses. The comparison includes single and dual isocenter techniques for key region such as match-line, nipple, under the MLC, supraclavicular and out of field like in cardiac regions with two different machine COMPACT and ONCOR.