PROBLEM TO BE SOLVED: To promptly set a position of a coherence gate in OCT imaging.SOLUTION: An optical coherence tomography imaging apparatus that acquires a tomographic image from interference light between a reference beam and a measuring beam obtained via an object includes a CG control unit 303 configured to control a difference in optical path length between the reference beam and the measuring beam by a control method according to an imaging target region obtained by a region obtaining unit 301, and a signal processing unit 190 configured to generate image data of the object based on an electrical signal obtained by detecting the interference light with the difference in optical path length controlled by the control method.COPYRIGHT: (C)2014,JPO&INPIT【課題】 OCT撮影においてコヒーレンスゲートの位置を迅速に設定する。【解決手段】 参照光と被写体を経由した測定光との干渉光から断層画像を得る光干渉断層撮影装置において、CG制御部303は部位取得部301で得られる撮影部位に応じた制御方法で参照光と測定光の光路長差を制御する。信号処理部190は光路長差が制御された状態で干渉光を検出して得られる電気信号に基づき被写体の画像データを生成する。【選択図】 図3