PROBLEM TO BE SOLVED: To selectively extract from OCT measurement data the image data for only the choroid vascular plexus present in a choroid layer, and accurately obtain from the image data the thickness of the choroid blood vessels and thickness of the choroid vascular plexus, thereby enabling quantitative evaluation of the choroid vascular plexus.SOLUTION: An optical coherence tomography apparatus comprises: an optical coherence tomograph and a computer for performing image processing of a three-dimensional OCT image obtained on the basis of the OCT measurement data acquired by the optical coherence tomograph. The computer functions as means for selectively isolating only images of the choroid blood vessels from the three-dimensional OCT image to acquire image data for the choroid blood vessels, and means for acquiring data for performing quantitative evaluation of the shape of the choroid blood vessels on the basis of the image data for the choroid blood vessels.COPYRIGHT: (C)2015,JPO&INPIT【課題】OCT計測データから、脈絡膜の層内に存在する脈絡膜血管網のみの画像データを選択的に抽出し、該画像データから脈絡膜血管の太さや、脈絡膜血管網の厚さを正確に得て、脈絡膜血管網の定量評価を可能とする。【解決手段】光干渉断層計装置は、光干渉断層計と、光干渉断層計で取得したOCT計測データに基づいて得た三次元のOCT断層画像の画像処理を行うコンピュータと、を備え、コンピュータは、三次元のOCT断層画像から脈絡膜の血管の画像のみを選択的に分離して脈絡膜の血管の画像データを取得する手段、及び脈絡膜の血管の画像データに基づき脈絡膜の血管の形状の定量評価を行うためのデータを得る手段、として機能する。【選択図】図3
