PROBLEM TO BE SOLVED: To provide a puncture needle drive device or the like which can accurately place a seed in a prostate periphery and obtain a high-quality dose distribution to thereby improve the treatment rate of prostate cancer, and reduce a burden on a patient by eliminating the need for additional anesthesia during an operation.SOLUTION: A puncture needle drive device comprises: a gear drive mechanism 130 for rotating a gear 174 an insertion tool 114a which can penetrate through a through hole 106 a groove 112a which engages with the insertion tool 114a by a predetermined engagement to apply a rotary motion to the insertion tool 114a that performs a linear motion in a direction of F or B and a puncture needle 302 connected to a needle clamp 116. The gear 174 is a helical gear, and teeth 124 engaging with the gear 174 are formed on the entire circumference at an even pitch in the insertion tool 114a. When the insertion tool 114a is made to be a male screw, the predetermined engagement is an engagement by the male screw and an engaging female screw. By the engagement, the groove 112a applies the rotary motion to the insertion tool 114a that performs the linear motion in the F direction or the B direction.COPYRIGHT: (C)2015,JPO&INPIT【課題】シードを前立腺辺縁に正確に配置し、質の高い線量分布を得て前立腺がんの治療率を向上させることができ、施術途中の麻酔の追加を不要にして被治療者の負担を軽減することができる穿刺針駆動装置等を提供する。【解決手段】歯車174を回転させる歯車駆動機構130と、貫通孔106に貫通可能な装入具114aと、所定の噛合いにより装入具114aと噛合い、F、B方向への直線運動を行う装入具114aに回転運動を加えるグルーブ112aと、針クランプ116に接続された穿刺針302とを備えている。歯車174ははすば歯車であり、装入具114aには歯車174と噛合う歯124が等ピッチで全周に形成されている。所定の噛合いは、装入具114aを雄螺子とした際の当該雄螺子と噛合う雌螺子による噛合いである。当該噛合いにより、グルーブ112aはF方向またはB方向への直線運動を行う装入具114aに回転運動を加えている。【選択図】図1
