Apparatus for delivering brachytherapy to a target tissue region includes an elongate body including a proximal end, a distal end sized for introduction into a tissue tract and carrying a plurality of elongate members including pathways for receiving a source of radiation. The elongate members are movable...http://www.google.com.tw/patents/US7862496?utm_source=gb-gplus-share專利 US7862496 - Brachytherapy apparatus and methods for using them
