Yb-based high dose rate intensity modulated brachytherapy for focal treatment of prostate cancer.

Purpose: This study compares conventional Ir-based high dose rate brachytherapy (HDR-BT) with Yb-based HDR intensity modulated brachytherapy (IMBT) for focal prostate cancer treatment. Additionally, the study explores the potential to generate less invasive treatment plans with IMBT by reducing the number of catheters needed to achieve acceptable outcomes.

Methods And Materials: A retrospective dosimetric study of ten prostate cancer patients initially treated with conventional Ir-based HDR-BT and 5-14 catheters was employed.