PROBLEM TO BE SOLVED: To provide a surgery support system that can reliably and accurately detect movement stoppage of even an existing surgical instrument having no sensor and automatically updates and displays navigation information whenever an operator needs it.SOLUTION: A surgery support system 1 comprises a surgical instrument 11, a three-dimensional surface shape scanner 20, an arithmetic device 40, and the like. The three-dimensional surface shape scanner 20 includes a light projection device 21 and a camera 22. The arithmetic device 40 creates navigation information based on updated positioning information of data from the three-dimensional surface shape scanner 20 and three-dimensional inner shape data. The arithmetic device 40 determines whether or not the surgical instrument 11 has stopped for a predetermined time or more based on image information obtained by imaging an object present in an operation room during a surgery. The arithmetic device 40 has an automatic scanner drive function of scanning by actuating the light projection device 21 of the three-dimensional surface shape scanner 20 so as to newly acquire three-dimensional surface shape data at the time of stop determination.SELECTED DRAWING: Figure 1【課題】センサ等を持たない既存の手術器具でもその移動停止を確実かつ正確に検出でき、術者が必要な時に自動的にナビゲーション情報の更新・表示を行う手術支援システムの提供。【解決手段】本発明の手術支援システム１は、手術器具１１、３次元表面形状スキャナ２０、演算装置４０等を備える。３次元表面形状スキャナ２０は、光投影装置２１及びカメラ２２を含む。演算装置４０は、３次元表面形状スキャナ２０からのデータと、３次元内部形状データとの更新位置合わせ情報に基づいて、ナビゲーション情報を作成する。演算装置４０は、手術室内に存在する物体を術中に撮像して得た画像情報に基づいて手術器具１１が所定時間以上停止しているか否かを判定する。演算装置４０は、停止判定時には、３次元表面形状データを新規に取得するべく３次元表面形状スキャナ２０の光投影装置２１を作動させてスキャンを行うスキャナ自動駆動機能を有する。【選択図】図１
