Low-dose-rate radioactive seed implant has been the brachytherapy of choice for early stage prostate cancer. In recent years, the use of high-dose-rate ( HDR ) interstitial brachytherapy has become more prevalent in the United States. 多年来早期局限性前列腺癌的近距离放射以低剂量率放射粒子植入为主,但近年来美国各肿瘤治疗中心已逐渐开展了针对局限性前列腺癌的高剂量率(high-dose-rate,HDR)近距离放射。